The ISC DHCP programs are vulnerable to several format string vulnerabilities which may allow a remote attacker to execute arbitrary code with the permissions of the DHCP programs, typically root for the DHCP server.

Multiple cross-site scripting (XSS) vulnerabilities in eGroupware before 1.0.0.007 allow remote attackers to inject arbitrary web script or HTML via the (1) ab_id, (2) page, (3) type, or (4) lang parameter to index.php or (5) category_id parameter.

Multiple SQL injection vulnerabilities in index.php in eGroupware before 1.0.0.007 allow remote attackers to execute arbitrary SQL commands via the (1) filter or (2) cats_app parameter.

In fetchmail 6.2.5.1, the the remote code injection via POP3 UIDL was fixed, but a denial of service attack was introduced:

Two possible NULL-pointer dereferences allow a malicous POP3 server to crash fetchmail by respondig with UID lines containing only the article number but no UID (in violation of RFC-1939), or a message without Message-ID when no UIDL support is available.

Natanael Copa reports that dnrd is vulnerable to a remote buffer overflow and a remote stack overflow. These vulnerabilities can be triggered by sending invalid DNS packets to dnrd.

The buffer overflow could potentially be used to execute arbitrary code with the permissions of the dnrd daemon. Note that dnrd runs in an chroot environment and runs as non-root.

The stack overflow vulnerability can cause dnrd to crash.

The LDAP backend in PowerDNS has issues with escaping queries which could cause connection errors. This would make it possible for a malicious user to temporarily blank domains.

This is known to affect all releases prior to 2.9.18.

fetchmail's POP3/UIDL code does not truncate received UIDs properly. A malicious or compromised POP3 server can thus corrupt fetchmail's stack and inject code when fetchmail is using UIDL, either through configuration, or as a result of certain server capabilities. Note that fetchmail is run as root on some sites, so an attack might compromise the root account and thus the whole machine.

A KDE Security Advisory explains:

Kate / Kwrite create a file backup before saving a modified file. These backup files are created with default permissions, even if the original file had more strict permissions set.

Depending on the system security settings, backup files might be readable by other users. Kate / Kwrite are network transparent applications and therefore this vulnerability might not be restricted to local users.

The Mozilla Foundation reports of multiple security vulnerabilities in Firefox and Mozilla:

• MFSA 2005-56 Code execution through shared function objects
• MFSA 2005-55 XHTML node spoofing
• MFSA 2005-54 Javascript prompt origin spoofing
• MFSA 2005-53 Standalone applications can run arbitrary code through the browser
• MFSA 2005-52 Same origin violation: frame calling top.focus()
• MFSA 2005-51 The return of frame-injection spoofing
• MFSA 2005-50 Possibly exploitable crash in InstallVersion.compareTo()
• MFSA 2005-49 Script injection from Firefox sidebar panel using data:
• MFSA 2005-48 Same-origin violation with InstallTrigger callback
• MFSA 2005-47 Code execution via "Set as Wallpaper"
• MFSA 2005-46 XBL scripts ran even when Javascript disabled
• MFSA 2005-45 Content-generated event vulnerabilities

Kuba Zygmunt discovered a flaw in the input validation routines of Drupal's filter mechanism. An attacker could execute arbitrary PHP code on a target site when public comments or postings are allowed.

A Securityreason.com advisory reports that various cross site scripting vulnerabilities have been found in phpSysInfo. Input is not properly sanitised before it is returned to the user. A malicious person could exploit this to execute arbitrary HTML and script code in a users browser session. Also it is possible to view the full path of certain scripts by accessing them directly.

A Zataz advisory reports that MySQL contains a security flaw which could allow a malicious local user to inject arbitrary SQL commands during the initial database creation process.

The problem lies in the mysql_install_db script which creates temporary files based on the PID used by the script.

A Gentoo advisory reports:

Net-SNMP creates temporary files in an insecure manner, possibly allowing the execution of arbitrary code.

A malicious local attacker could exploit a race condition to change the content of the temporary files before they are executed by fixproc, possibly leading to the execution of arbitrary code. A local attacker could also create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When fixproc is executed, this would result in the file being overwritten.

phpBB is vulnerable to remote exploitation of an input validation vulnerability allows attackers to read the contents of arbitrary system files under the privileges of the webserver. This also allows remote attackers to unlink arbitrary system files under the privileges of the webserver.

A Zataz advisory reports that shtool contains a security flaw which could allow a malicious local user to create or overwrite the contents of arbitrary files. The attacker could fool a user into executing the arbitrary file possibly executing arbitrary code.

A Secunia Advisory reports:

A vulnerability has been reported in phpPgAdmin, which can be exploited by malicious people to disclose sensitive information.

Input passed to the "formLanguage" parameter in "index.php" isn't properly verified, before it is used to include files. This can be exploited to include arbitrary files from local resources.

Successful exploitation requires that "magic_quotes_gpc" is disabled.

The pear-XML_RPC release notes reports that the following issues has been fixed:

Eliminate path disclosure vulnerabilities by suppressing error messages when eval()'ing.

Eliminate path disclosure vulnerability by catching bogus parameters submitted to XML_RPC_Value::serializeval().

Eric Romang reports that ekg creates temporary files in an insecure manner. This can be exploited by an attacker using a symlink attack to overwrite arbitrary files and possibly execute arbitrary commands with the permissions of the user running ekg.

A Bugzilla Security Advisory reports:

Any user can change any flag on any bug, even if they don't have access to that bug, or even if they can't normally make bug changes. This also allows them to expose the summary of a bug.

Bugs are inserted into the database before they are marked as private, in Bugzilla code. Thus, MySQL replication can lag in between the time that the bug is inserted and when it is marked as private (usually less than a second). If replication lags at this point, the bug summary will be accessible to all users until replication catches up. Also, on a very slow machine, there may be a pause longer than a second that allows users to see the title of the newly-filed bug.

Insecure file permissions, network access control and DNS usage put systems that use Legato NetWorker at risk.

When the software is running, several files that contain sensitive information are created with insecure permissions. The information exposed include passwords and can therefore be used for privilege elevation.

An empty "servers" file, which should normally contain hostnames of authorized backup servers, may allow unauthorized backups to be made. Sensitive information can be extracted from these backups.

When reverse DNS fails for the Legato client IP a weak authorization scheme, containing a flaw that allows unauthorized access, is used. This may allow unauthorized access.

Secunia Research reports:

Secunia has discovered a security issue in Adobe Reader for Linux, which can be exploited by malicious, local users to gain knowledge of sensitive information.

The problem is caused due to temporary files being created with permissions based on a user's umask in the "/tmp" folder under certain circumstances when documents are opened.

Successful exploitation allows an unprivileged user to read arbitrary users' documents.

An iDEFENSE Security Advisory reports:

Remote exploitation of an input validation error in Clam AntiVirus ClamAV allows attackers to cause a denial of service condition.

The vulnerability specifically exists due to insufficient validation on cabinet file header data. The ENSURE_BITS() macro fails to check for zero length reads, allowing a carefully constructed cabinet file to cause an infinite loop.

ClamAV is used in a number of mail gateway products. Successful exploitation requires an attacker to send a specially constructed CAB file through a mail gateway or personal anti-virus client utilizing the ClamAV scanning engine. The infinate loop will cause the ClamAV software to use all available processor resources, resulting in a denial of service or severe degradation to system performance. Remote exploitation can be achieved by sending a malicious file in an e-mail message or during an HTTP session.

An iDEFENSE Security Advisory reports:

Remote exploitation of an input validation error in Clam AntiVirus ClamAV allows attackers to cause a denial of service condition.

The vulnerability specifically exists due to improper behavior during exceptional conditions.

Successful exploitation allows attackers to exhaust file descriptors pool and memory. Anti-virus detection functionality will fail if there is no file descriptors available with which to open files. Remote exploitation can be achieved by sending a malicious file in an e-mail message or during an HTTP session.

Problem Description

An error in the handling of corrupt compressed data streams can result in a buffer being overflowed.

Impact

By carefully crafting a corrupt compressed data stream, an attacker can overwrite data structures in a zlib-using application. This may cause the application to halt, causing a denial of service; or it may result in the attacker gaining elevated privileges.

An Adobe Security Advisory reports:

A vulnerability within Adobe Reader has been identified. Under certain circumstances, remote exploitation of a buffer overflow in Adobe Reader could allow an attacker to execute arbitrary code.

If exploited, it could allow the execution of arbitrary code under the privileges of the local user. Remote exploitation is possible if the malicious PDF document is sent as an email attachment or if the PDF document is accessed via a web link.

A Net-SNMP release announcement reports:

A security vulnerability has been found in Net-SNMP releases that could allow a denial of service attack against Net-SNMP agent's which have opened a stream based protocol (EG, TCP but not UDP; it should be noted that Net-SNMP does not by default open a TCP port).

Stefan Esser reports:

Wrongly implemented user input filters lead to multiple SQL Injection vulnerabilities which can lead f.e. to disclosure of the admin password hash.

Wrongly implemented user input filters allows injection of user input into executed commandline.

Alberto Trivero posted his Remote Command Execution Exploit for Cacti <= 0.8.6d to Bugtraq on the 22th June. Having analysed his bug we come to the conclusion, that the malfunctioning input filters, which were already mentioned in the previous advisory are also responsible for this bug still being exploitable.

A HTTP headers bypass switch can also be used to completely bypass the authentification system of Cacti. As admin it is possible to execute shell commands with the permission of the webserver.

While looking at the source of Cacti a HTTP headers bypass switch was discovered, that also switches off a call to session_start() and the manual application of addslashes() in case of magic_quotes_gpc=Off.

When register_globals is turned on* an attacker can use this switch to disables Cacti's use of PHP's session support and therefore supply the session variables on his own through f.e. the URL. Additionally using the switch renders several SQL statements vulnerable to SQL Injections attacks, when magic_quotes_gpc is turned off, which is the recommended setting.

Logged in as an admin it is possible to issue shell commands.

(*) register_globals is turned off by default since PHP 4.2 but is activated on most servers because of older scripts requiring it.

GulfTech Security Research reports:

There are a number of vulnerabilities in WordPress that may allow an attacker to ultimately run arbitrary code on the vulnerable system. These vulnerabilities include SQL Injection, Cross Site Scripting, and also issues that may aid an attacker in social engineering.

A Gentoo Linux Security Advisory reports:

Due to a lack of input validation, WordPress is vulnerable to SQL injection and XSS attacks.

An attacker could use the SQL injection vulnerabilites to gain information from the database. Furthermore the cross-site scripting issues give an attacker the ability to inject and execute malicious script code or to steal cookie-based authentication credentials, potentially compromising the victim's browser.

FrSIRT Advisory reports:

A vulnerability was identified in phpBB, which may be exploited by attackers to compromise a vulnerable web server. This flaw is due to an input validation error in the "viewtopic.php" script that does not properly filter the "highlight" parameter before calling the "preg_replace()" function, which may be exploited by remote attackers to execute arbitrary PHP commands with the privileges of the web server.

GulfTech Security Research Team reports:

PEAR XML_RPC is vulnerable to a very high risk php code injection vulnerability due to unsanatized data being passed into an eval() call.

Problem Description

The ipfw tables lookup code caches the result of the last query. The kernel may process multiple packets concurrently, performing several concurrent table lookups. Due to an insufficient locking, a cached result can become corrupted that could cause some addresses to be incorrectly matched against a lookup table.

Impact

When lookup tables are used with ipfw, packets may on very rare occasions incorrectly match a lookup table. This could result in a packet being treated contrary to the defined packet filtering ruleset. For example, a packet may be allowed to pass through when it should have been discarded.

The problem can only occur on Symmetric Multi-Processor (SMP) systems, or on Uni Processor (UP) systems with the PREEMPTION kernel option enabled (not the default).

Workaround

a) Do not use lookup tables.

OR

b) Disable concurrent processing of packets in the network stack by setting the "debug.mpsafenet=0" tunable:

# echo "debug.mpsafenet=0" << /boot/loader.conf

Problem Description

Two problems have been discovered relating to the extraction of bzip2-compressed files. First, a carefully constructed invalid bzip2 archive can cause bzip2 to enter an infinite loop. Second, when creating a new file, bzip2 closes the file before setting its permissions.

Impact

The first problem can cause bzip2 to extract a bzip2 archive to an infinitely large file. If bzip2 is used in automated processing of untrusted files this could be exploited by an attacker to create an denial-of-service situation by exhausting disk space or by consuming all available cpu time.

The second problem can allow a local attacker to change the permissions of local files owned by the user executing bzip2 providing that they have write access to the directory in which the file is being extracted.

Workaround

Do not uncompress bzip2 archives from untrusted sources and do not uncompress files in directories where untrusted users have write access.

Problem Description

Two problems have been discovered in the FreeBSD TCP stack.

First, when a TCP packets containing a timestamp is received, inadequate checking of sequence numbers is performed, allowing an attacker to artificially increase the internal "recent" timestamp for a connection.

Second, a TCP packet with the SYN flag set is accepted for established connections, allowing an attacker to overwrite certain TCP options.

Impact

Using either of the two problems an attacker with knowledge of the local and remote IP and port numbers associated with a connection can cause a denial of service situation by stalling the TCP connection. The stalled TCP connection my be closed after some time by the other host.

Workaround

In some cases it may be possible to defend against these attacks by blocking the attack packets using a firewall. Packets used to effect either of these attacks would have spoofed source IP addresses.

An Ethreal Security Advisories reports:

An aggressive testing program as well as independent discovery has turned up a multitude of security issues:

• The ANSI A dissector was susceptible to format string vulnerabilities. Discovered by Bryan Fulton.
• The GSM MAP dissector could crash.
• The AIM dissector could cause a crash.
• The DISTCC dissector was susceptible to a buffer overflow. Discovered by Ilja van Sprundel
• The FCELS dissector was susceptible to a buffer overflow. Discovered by Neil Kettle
• The SIP dissector was susceptible to a buffer overflow. Discovered by Ejovi Nuwere.
• The KINK dissector was susceptible to a null pointer exception, endless looping, and other problems.
• The LMP dissector was susceptible to an endless loop.
• The Telnet dissector could abort.
• The TZSP dissector could cause a segmentation fault.
• The WSP dissector was susceptible to a null pointer exception and assertions.
• The 802.3 Slow protocols dissector could throw an assertion.
• The BER dissector could throw assertions.
• The SMB Mailslot dissector was susceptible to a null pointer exception and could throw assertions.
• The H.245 dissector was susceptible to a null pointer exception.
• The Bittorrent dissector could cause a segmentation fault.
• The SMB dissector could cause a segmentation fault and throw assertions.
• The Fibre Channel dissector could cause a crash.
• The DICOM dissector could attempt to allocate large amounts of memory.
• The MGCP dissector was susceptible to a null pointer exception, could loop indefinitely, and segfault.
• The RSVP dissector could loop indefinitely.
• The DHCP dissector was susceptible to format string vulnerabilities, and could abort.
• The SRVLOC dissector could crash unexpectedly or go into an infinite loop.
• The EIGRP dissector could loop indefinitely.
• The ISIS dissector could overflow a buffer.
• The CMIP, CMP, CMS, CRMF, ESS, OCSP, PKIX1Explitit, PKIX Qualified, and X.509 dissectors could overflow buffers.
• The NDPS dissector could exhaust system memory or cause an assertion, or crash.
• The Q.931 dissector could try to free a null pointer and overflow a buffer.
• The IAX2 dissector could throw an assertion.
• The ICEP dissector could try to free the same memory twice.
• The MEGACO dissector was susceptible to an infinite loop and a buffer overflow.
• The DLSw dissector was susceptible to an infinite loop.
• The RPC dissector was susceptible to a null pointer exception.
• The NCP dissector could overflow a buffer or loop for a large amount of time.
• The RADIUS dissector could throw an assertion.
• The GSM dissector could access an invalid pointer.
• The SMB PIPE dissector could throw an assertion.
• The L2TP dissector was susceptible to an infinite loop.
• The SMB NETLOGON dissector could dereference a null pointer.
• The MRDISC dissector could throw an assertion.
• The ISUP dissector could overflow a buffer or cause a segmentation fault.
• The LDAP dissector could crash.
• The TCAP dissector could overflow a buffer or throw an assertion.
• The NTLMSSP dissector could crash.
• The Presentation dissector could overflow a buffer.
• Additionally, a number of dissectors could throw an assertion when passing an invalid protocol tree item length.

Roger Dingledine reports:

The Tor 0.1.0.10 release from a few days ago includes a fix for a bug that might allow an attacker to read arbitrary memory (maybe even keys) from an exit server's process space. We haven't heard any reports of exploits yet, but hey.

An iDEFENSE Security Advisory reports:

Remote exploitation of a heap-based buffer overflow vulnerability in the RealText file format parser within various versions of RealNetworks Inc.'s RealPlayer could allow attackers to execute arbitrary code.

Nobuhiro IMAI reports:

the default value modification on Module#public_instance_methods (from false to true) breaks s.add_handler(XMLRPC::iPIMethods("sample"), MyHandler.new) style security protection.

This problem could allow a remote attacker to execute arbitrary commands on XMLRPC server of libruby.

iDEFENSE security group disclosed potential SQL injection attacks from unchecked user input and two security holes regarding potential cross site scripting attacks

A Secunia Advisory reports:

Secunia Research has discovered a vulnerability in Opera, which can be exploited by malicious people to steal content or to perform actions on other web sites with the privileges of the user.

Normally, it should not be possible for the XMLHttpRequest object to access resources from outside the domain of which the object was opened. However, due to insufficient validation of server side redirects, it is possible to circumvent this restriction.

A Secunia Advisory reports:

Secunia Research has discovered a vulnerability in Opera, which can be exploited by malicious people to conduct cross-site scripting attacks and to read local files.

The vulnerability is caused due to Opera not properly restricting the privileges of "javascript:" URLs when opened in e.g. new windows or frames.

A Secunia Advisory reports:

Secunia Research has discovered a vulnerability in Opera, which can be exploited by malicious people to conduct cross-site scripting attacks against users.

The vulnerability is caused due to input not being sanitised, when Opera generates a temporary page for displaying a redirection when "Automatic redirection" is disabled (not default setting).

Todd C. Miller reports:

A race condition in Sudo's command pathname handling prior to Sudo version 1.6.8p9 that could allow a user with Sudo privileges to run arbitrary commands.

Exploitation of the bug requires that the user be allowed to run one or more commands via Sudo and be able to create symbolic links in the filesystem. Furthermore, a sudoers entry giving another user access to the ALL pseudo-command must follow the user's sudoers entry for the race to exist.

Stefan Esser reports:

Trac's wiki and ticket systems allows to add attachments to wiki entries and bug tracker tickets. These attachments are stored within directories that are determined by the id of the corresponding ticket or wiki entry.

Due to a missing validation of the id parameter it is possible for an attacker to supply arbitrary paths to the upload and attachment viewer scripts. This means that a potential attacker can retrieve any file accessible by the webserver user.

Additionally it is possible to upload arbitrary files (up to a configured file length) to any place the webserver has write access too.

For obvious reasons this can lead to the execution of arbitrary code if it possible to upload files to the document root or it's subdirectories. One example of a configuration would be f.e. running Trac and s9y/wordpress with writeable content directories on the same webserver.

Another potential usage of this exploit would be to abuse Trac powered webservers as storage for f.e. torrent files.

A Secunia security advisory reports:

Two vulnerabilities have been reported in Razor-agents, which can be exploited by malicious people to cause a DoS (Denial of Service).

1. An unspecified error in the preprocessing of certain HTML messages can be exploited to crash the application.
2. A bug in the discovery logic causes Razor-agents to go into an infinite loop and consume a large amount of memory when discovery fails.

Apache SpamAssassin Security Team reports:

Apache SpamAssassin 3.0.4 was recently released, and fixes a denial of service vulnerability in versions 3.0.1, 3.0.2, and 3.0.3. The vulnerability allows certain misformatted long message headers to cause spam checking to take a very long time.

While the exploit has yet to be seen in the wild, we are concerned that there may be attempts to abuse the vulnerability in the future. Therefore, we strongly recommend all users of these versions upgrade to Apache SpamAssassin 3.0.4 as soon as possible.

A SquirrelMail Security Advisory reports:

Several cross site scripting (XSS) vulnerabilities have been discovered in SquirrelMail versions 1.4.0 - 1.4.4.

The vulnerabilities are in two categories: the majority can be exploited through URL manipulation, and some by sending a specially crafted email to a victim. When done very carefully, this can cause the session of the user to be hijacked.

Sverre H. Huseby discovered a vulnerability in Adobe Acrobat and Adobe Reader. Under certain circumstances, using XML scripts it is possible to discover the existence of local files.

Problem Description

Two problems related to extraction of files exist in gzip:

The first problem is that gzip does not properly sanitize filenames containing "/" when uncompressing files using the -N command line option.

The second problem is that gzip does not set permissions on newly extracted files until after the file has been created and the file descriptor has been closed.

Impact

The first problem can allow an attacker to overwrite arbitrary local files when uncompressing a file using the -N command line option.

The second problem can allow a local attacker to change the permissions of arbitrary local files, on the same partition as the one the user is uncompressing a file on, by removing the file the user is uncompressing and replacing it with a hardlink before the uncompress operation is finished.

Workaround

Do not use the -N command line option on untrusted files and do not uncompress files in directories where untrusted users have write access.

Problem Description

Several tcpdump protocol decoders contain programming errors which can cause them to go into infinite loops.

Impact

An attacker can inject specially crafted packets into the network which, when processed by tcpdump, could lead to a denial-of-service. After the attack, tcpdump would no longer capture traffic, and would potentially use all available processor time.

Jacopo Ottaviani reports that Gaim can be crashed by being offered files with names containing non-ASCII characters via the Yahoo! protocol.

The GAIM team reports:

Remote attackers can cause a denial of service (crash) via a malformed MSN message that leads to a memory allocation of a large size, possibly due to an integer signedness error.

A web server running Gallery can be exploited for arbitrary PHP code execution through the use of a maliciously crafted URL.

Gallery includes several cross-site scripting vulnerabilities that could allow malicious content to be injected.

A KDE Security Advisory explains:

Overview

KStars includes support for the Instrument Neutral Distributed Interface (INDI). The build system of this extra 3rd party software contained an installation hook to install fliccd (part of INDI) as SUID root application.

Erik Sjölund discovered that the code contains several vulnerabilities that allow stack based buffer overflows.

Impact

If the fliccd binary is installed as suid root, it enables root privilege escalation for local users, or, if the daemon is actually running (which it does not by default) and is running as root, remote root privilege escalation.

3APA3A reports:

If programmer fails to check socket number before using select() or fd_set macros, it's possible to overwrite memory behind fd_set structure. Very few select() based application actually check FD_SETSIZE value. [...]

Depending on vulnerable application it's possible to overwrite portions of memory. Impact is close to off-by-one overflows, code execution doesn't seems exploitable.

Matthias Andree reports:

A vulnerability was found in the fetchnews program (the NNTP client) that may under some circumstances cause a wait for input that never arrives, fetchnews "hangs". [...]

As only one fetchnews program can run at a time, subsequently started fetchnews and texpire programs will terminate. [...]

Upgrade your leafnode package to version 1.11.3.

An STG Security Advisory reports:

GForge CVS module made by Dragos Moinescu and another module made by Ronald Petty have a directory traversal vulnerability. [...] malicious attackers can read arbitrary directory lists.

The CRAM-MD5 authentication support of the University of Washington IMAP and POP3 servers contains a vulnerability that may allow an attacker to bypass authentication and impersonate arbitrary users. Only installations with CRAM-MD5 support configured are affected.

The Squid team reported several denial-of-service vulnerabilities related to the handling of DNS responses and NT Lan Manager messages. These may allow an attacker to crash the Squid cache.

Sebastian Krahmer discovered that the racoon ISAKMP daemon could be crashed with a maliciously crafted UDP packet. No authentication is required in order to perform the attack.

Tavis Ormandy discovered several integer overflows in xli's image size handling. A maliciously crafted image may be able to cause a heap buffer overflow and execute arbitrary code.

Tavis Ormandy discovered that xli and xloadimage attempt to decompress images by piping them through gunzip or similar decompression tools. Unfortunately, the unsanitized file name is included as part of the command. This is dangerous, as in some situations, such as mailcap processing, an attacker may control the input file name. As a result, an attacker may be able to cause arbitrary command execution.

In 2001, zen-parse discovered a buffer overflow in xloadimage's FACES image loader. A maliciously crafted image could cause xloadimage to execute arbitrary code. A published exploit exists for this vulnerability.

In 2005, Rob Holland discovered that the same vulnerability was present in xli.

Stanislav Brabec discovered errors in yamt's path name handling that lead to buffer overflows and directory traversal issues. When processing a file with a maliciously crafted ID3 tag, yamt might overwrite arbitrary files or possibly execute arbitrary code.

The SuSE package ChangeLog contains:

• Several security fixes (#49337):
• directory traversal in rename
• directory traversal in sort
• buffer overflow in sort
• buffer overflow in rename

A Debian Security Advisory reports:

Erik Sjölund discovered that programs linked against xview are vulnerable to a number of buffer overflows in the XView library. When the overflow is triggered in a program which is installed setuid root a malicious user could perhaps execute arbitrary code as privileged user.

The X display locking program xtrlock contains an integer overflow bug. It is possible for an attacker with physical access to the system to bypass the display lock.

Trevor Johnson reported that the Red Hat Linux RPMs used by linux_base contained multiple older vulnerabilities, such as a DNS resolver issue and critical bugs in X font handling and XPM image handling.

A SquirrelMail Security Advisory reports:

SquirrelMail 1.4.4 has been released to resolve a number of security issues disclosed below. It is strongly recommended that all running SquirrelMail prior to 1.4.4 upgrade to the latest release.

Remote File Inclusion

Manoel Zaninetti reported an issue in src/webmail.php which would allow a crafted URL to include a remote web page. This was assigned CAN-2005-0103 by the Common Vulnerabilities and Exposures.

Cross Site Scripting Issues

A possible cross site scripting issue exists in src/webmail.php that is only accessible when the PHP installation is running with register_globals set to On. This issue was uncovered internally by the SquirrelMail Development team. This isssue was assigned CAN-2005-0104 by the Common Vulnerabilities and Exposures.

A second issue which was resolved in the 1.4.4-rc1 release was uncovered and assigned CAN-2004-1036 by the Common Vulnerabilities and Exposures. This issue could allow a remote user to send a specially crafted header and cause execution of script (such as javascript) in the client browser.

Local File Inclusion

A possible local file inclusion issue was uncovered by one of our developers involving custom preference handlers. This issue is only active if the PHP installation is running with register_globals set to On.

Erik Sjölund discovered a vulnerabilitiy in Sympa. The queue application processes messages received via aliases. It contains a buffer overflow in the usage of sprintf. In some configurations, it may allow an attacker to execute arbitrary code as the sympa user.

Florian Weimer wrote:

Mailman 2.1.5 uses weak auto-generated passwords for new subscribers. These passwords are assigned when members subscribe without specifying their own password (either by email or the web frontend). Knowledge of this password allows an attacker to gain access to the list archive even though she's not a member and the archive is restricted to members only. [...]

This means that only about 5 million different passwords are ever generated, a number that is in the range of brute force attacks -- you only have to guess one subscriber address (which is usually not that hard).

Barry Warsaw reports:

Today I am releasing Mailman 2.1.5, a bug fix release [...] This version also contains a fix for an exploit that could allow 3rd parties to retrieve member passwords. It is thus highly recommended that all existing sites upgrade to the latest version.

Oliver Karow discovered cross-site scripting issues in the Apache Jakarta Tomcat manager. The developers refer to the issues as minor.

A Secunia security advisory reports:

A vulnerability has been reported in FreeStyle Wiki and FSWikiLite, which can be exploited by malicious people to conduct script insertion attacks.

Input passed in uploaded attachments is not properly sanitised before being used. This can be exploited to inject arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when the malicious attachment is viewed.

A Gentoo Advisory reports:

The FreeRADIUS server is vulnerable to an SQL injection attack and a buffer overflow, possibly resulting in disclosure and modification of data and Denial of Service.

A Debian Advisory reports:

Jens Steube discovered that ppxp, yet another PPP program, does not release root privileges when opening potentially user supplied log files. This can be tricked into opening a root shell.

A RST/GHC Advisory reports that there is an format string vulnerability in oops. The vulnerability can be found in the MySQL/PgSQL authentication module. Succesful exploitation may allow execution of arbitrary code.

The developers of cdrdao report that there is a potential root exploit in the software. In order to be able to succesfully exploit this vulnerability cdrdao must be installed setuid root. When succesfully exploited a local user might get escalated privileges. By default this port is not installed setuid root.

The GAIM team reports:

Potential remote denial of service bug resulting from not checking a pointer for non-NULL before passing it to strncmp, which results in a crash. This can be triggered by a remote client sending an SLP message with an empty body.

The GAIM team reports that GAIM is vulnerable to a denial-of-service vulnerability which can cause GAIM to crash:

It is possible for a remote user to overflow a static buffer by sending an IM containing a very large URL (greater than 8192 bytes) to the Gaim user. This is not possible on all protocols, due to message length restrictions. Jabber are SILC are known to be vulnerable.

Problem description and impact

When running on processors supporting Hyper-Threading Technology, it is possible for a malicious thread to monitor the execution of another thread.

Information may be disclosed to local users, allowing in many cases for privilege escalation. For example, on a multi-user system, it may be possible to steal cryptographic keys used in applications such as OpenSSH or SSL-enabled web servers.

NOTE: Similar problems may exist in other simultaneous multithreading implementations, or even some systems in the absence of simultaneous multithreading. However, current research has only demonstrated this flaw in Hyper-Threading Technology, where shared memory caches are used.

Workaround

Systems not using processors with Hyper-Threading Technology support are not affected by this issue. On systems which are affected, the security flaw can be eliminated by setting the "machdep.hlt_logical_cpus" tunable:

# echo "machdep.hlt_logical_cpus=1" >> /boot/loader.conf

The system must be rebooted in order for tunables to take effect.

Use of this workaround is not recommended on "dual-core" systems, as this workaround will also disable one of the processor cores.

When an upstream server aborts the transmission or stops sending data after the fetchnews program has requested an article header or body, fetchnews may crash, without querying further servers that are configured. This can prevent articles from being fetched.

A Mozilla Foundation Security Advisory reports:

Additional checks were added to make sure Javascript eval and Script objects are run with the privileges of the context that created them, not the potentially elevated privilege of the context calling them in order to protect against an additional variant of MFSA 2005-41.

The Mozilla Foundation Security Advisory MFSA 2005-41 reports:

moz_bug_r_a4 reported several exploits giving an attacker the ability to install malicious code or steal data, requiring only that the user do commonplace actions like click on a link or open the context menu.

A Mozilla Foundation Security Advisory reports:

Some security checks intended to prevent script injection were incorrect and could be bypassed by wrapping a javascript: url in the view-source: pseudo-protocol. Michael Krax demonstrated that a variant of his favicon exploit could still execute arbitrary code, and the same technique could also be used to perform cross-site scripting.

Georgi Guninski demonstrated the same flaw wrapping javascript: urls with the jar: pseudo-protocol.

L. David Baron discovered a nested variant that defeated checks in the script security manager.

Workaround: Disable Javascript

A Mozilla Foundation Security Advisory reports:

Two vulnerabilities have been discovered in Firefox, which can be exploited by malicious people to conduct cross-site scripting attacks and compromise a user's system.

1. The problem is that "IFRAME" JavaScript URLs are not properly protected from being executed in context of another URL in the history list. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an arbitrary site.
2. Input passed to the "IconURL" parameter in "InstallTrigger.install()" is not properly verified before being used. This can be exploited to execute arbitrary JavaScript code with escalated privileges via a specially crafted JavaScript URL.

Successful exploitation requires that the site is allowed to install software (default sites are "update.mozilla.org" and "addons.mozilla.org").

A combination of vulnerability 1 and 2 can be exploited to execute arbitrary code.

The eqn2graph and pic2graph scripts in groff 1.18.1 allow local users to overwrite arbitrary files via a symlink attack on temporary files.

The groffer script in the groff package 1.18 and later versions allows local users to overwrite files via a symlink attack on temporary files.

An Ubuntu Advisory reports:

Joey Hess discovered that "unshar" created temporary files in an insecure manner. This could allow a symbolic link attack to create or overwrite arbitrary files with the privileges of the user invoking the program.

An rsnapshot Advisory reports:

The copy_symlink() subroutine in rsnapshot incorrectly changes file ownership on the files pointed to by symlinks, not on the symlinks themselves. This would allow, under certain circumstances, an arbitrary user to take ownership of a file on the main filesystem.

GHC team reports about coppermine

The lack of sanitizing of user defined variables may result in undesirable consequences such as IP spoofing or XSS attack.

Generally users of Coppermine Gallery can post comments. Remote address & x-forwarded-for variables are logged for admin's eyes. X-Forwarded-for variable does not pass throu any filtration before logging into database. User can define/redefine this variable.

Damian Put reports about ImageMagick:

Remote exploitation of a heap overflow vulnerability could allow execution of arbitrary code or course denial of service.

A heap overflow exists in ReadPNMImage() function, that is used to decode a PNM image files.

A xine security announcement reports:

By a user receiving data from a malicious network streaming server, an attacker can overrun a heap buffer, which can, on some systems, lead to or help in executing attacker-chosen malicious code with the permissions of the user running a xine-lib based media application.

Both the MMS and Real RTSP streaming client code made some too-strong assumptions on the transferred data. Several critical bounds checks were missing, resulting in the possibility of heap overflows, should the remote server not adhere to these assumptions. In the MMS case, a remote server could present content with too many individual streams; in the RTSP case, a remote server's reply could have too many lines.

An attacker can set up a server delivering malicious data to the users. This can be used to overflow a heap buffer, which can, with certain implementations of heap management, lead to attacker chosen data written to the stack. This can cause attacker-chosen code being executed with the permissions of the user running the application. By tricking users to retrieve a stream, which can be as easy as providing a link on a website, this vulnerability can be exploited remotely.

The GAIM team reports that GAIM is vulnerable to a denial-of-service vulnerability which can cause GAIM to freeze:

Certain malformed SNAC packets sent by other AIM or ICQ users can trigger an infinite loop in Gaim when parsing the SNAC. The remote user would need a custom client, able to generate malformed SNACs.

The GAIM team reports:

Receiving malformed HTML can result in an invalid memory access causing Gaim to crash.

A KDE Security Advisory reports:

Kommander executes without user confirmation data files from possibly untrusted locations. As they contain scripts, the user might accidentally run arbitrary code.

Impact: Remotly supplied kommander files from untrusted sources are executed without confirmation.

A Debian advisory reports:

James Ranson discovered that an attacker can modify the referrer setting with a carefully crafted URL by accidently overwriting a global variable.

Tavis Ormandy from the Gentoo Security Team discovered several heap corruptions due to inconsistent use of an internal function that can crash the daemon or possibly lead to the execution of arbitrary code.

A KDE Security Advisory reports:

kimgio contains a PCX image file format reader that does not properly perform input validation. A source code audit performed by the KDE security team discovered several vulnerabilities in the PCX and other image file format readers, some of them exploitable to execute arbitrary code.

Impact: Remotely supplied, specially crafted image files can be used to execute arbitrary code.

Gld has been found vulnerable to multiple buffer overflows as well as multiple format string vulnerabilities.

An attacker could exploit this vulnerability to execute arbitrary code with the permissions of the user running Gld, the default user being root.

The FreeBSD port defaults to running gld as the root user. The risk of exploitation can be minimized by making gld listen on the loopback address only, or configure it to only accept connections from trusted smtp servers.

A Debian Security Advisory reports:

Ulf Härnhammar from the Debian Security Audit Project discovered a buffer overflow in axel, a light download accelerator. When reading remote input the program did not check if a part of the input can overflow a buffer and maybe trigger the execution of arbitrary code.

A Mozilla Foundation Security Advisory reports:

When a webpage requires a plugin that is not installed the user can click to launch the Plugin Finder Service (PFS) to find an appropriate plugin. If the service does not have an appropriate plugin the EMBED tag is checked for a PLUGINSPAGE attribute, and if one is found the PFS dialog will contain a "manual install" button that will load the PLUGINSPAGE url.

Omar Khan reported that if the PLUGINSPAGE attribute contains a javascript: url then pressing the button could launch arbitrary code capable of stealing local data or installing malicious code.

Doron Rosenberg reported a variant that injects script by appending it to a malformed URL of any protocol.

Pluf has discovered a vulnerability in Sun Java JDK/SDK, which potentially can be exploited by malicious people to compromise a user's system.

The jar tool does not check properly if the files to be extracted have the string "../" on its names, so it's possible for an attacker to create a malicious jar file in order to overwrite arbitrary files within the filesystem.

A Mozilla Foundation Security Advisory reports:

moz_bug_r_a4 reported several exploits giving an attacker the ability to install malicious code or steal data, requiring only that the user do commonplace actions like click on a link or open the context menu. The common cause in each case was privileged UI code ("chrome") being overly trusting of DOM nodes from the content window. Scripts in the web page can override properties and methods of DOM nodes and shadow the native values, unless steps are taken to get the true underlying values.

We found that most extensions also interacted with content DOM in a natural, but unsafe, manner. Changes were made so that chrome code using this natural DOM coding style will now automatically use the native DOM value if it exists without having to use cumbersome wrapper objects.

Most of the specific exploits involved tricking the privileged code into calling eval() on an attacker-supplied script string, or the equivalent using the Script() object. Checks were added in the security manager to make sure eval and Script objects are run with the privileges of the context that created them, not the potentially elevated privileges of the context calling them.

Workaround: Disable Javascript

A Mozilla Foundation Security Advisory reports:

Firefox and the Mozilla Suite support custom "favicons" through the <LINK rel="icon"> tag. If a link tag is added to the page programmatically and a javascript: url is used, then script will run with elevated privileges and could run or install malicious software.

Workaround: Disable Javascript

A Mozilla Foundation Security Advisory reports:

A bug in javascript's regular expression string replacement when using an anonymous function as the replacement argument allows a malicious script to capture blocks of memory allocated to the browser. A web site could capture data and transmit it to a server without user interaction or knowledge.

Workaround: Disable Javascript

A Mozilla Foundation Security Advisory reports:

Sites can use the _search target to open links in the Firefox sidebar. Two missing security checks allow malicious scripts to first open a privileged page (such as about:config) and then inject script using a javascript: url. This could be used to install malicious code or steal data without user interaction.

Workaround: Disable Javascript

AD-LAB reports that a heap-based buffer overflow vulnerability exists in OpenOffice's handling of DOC documents. When reading a DOC document 16 bit from a 32 bit integer is used for memory allocation, but the full 32 bit is used for further processing of the document. This can allow an attacker to crash OpenOffice, or potentially execute arbitrary code as the user running OpenOffice, by tricking an user into opening a specially crafted DOC document.

Simon L. Nielsen discovered that portupgrade handles temporary files in an insecure manner. This could allow an unprivileged local attacker to execute arbitrary commands or overwrite arbitrary files with the permissions of the user running portupgrade, typically root, by way of a symlink attack.

The following issues exist where the temporary files are created, by default in the world writeable directory /var/tmp, with the permissions of the user running portupgrade:

• pkg_fetch download packages with a predictable local filename allowing a local attacker to overwrite arbitrary local files or potentially replace the downloaded package after download but before install with a package with malicious content, allowing the attacker to run arbitrary commands.
• portupgrade will, when upgrading ports/packages, write the old package to a predictable temporary file, allowing an attacker to overwrite arbitrary files via a symlink attack.
• portupgrade will touch a temporary temporary file with a constant filename (pkgdb.fixme) allowing an attacker to create arbitrary zero-byte files via a symlink attack.

A workaround for these issues is to set the PKG_TMPDIR environment variable to a directory only write-able by the user running portupgrade.

The GAIM team reports:

A remote jabber user can cause Gaim to crash by sending a specific file transfer request.

The GAIM team reports:

The IRC protocol plugin in Gaim 1.2.0, and possibly earlier versions, allows (1) remote attackers to inject arbitrary Gaim markup via irc_msg_kick, irc_msg_mode, irc_msg_part, irc_msg_quit, (2) remote attackers to inject arbitrary Pango markup and pop up empty dialog boxes via irc_msg_invite, or (3) malicious IRC servers to cause a denial of service (application crash) by injecting certain Pango markup into irc_msg_badmode, irc_msg_banned, irc_msg_unknown, irc_msg_nochan functions.

The GAIM team reports:

The gaim_markup_strip_html function in Gaim 1.2.0, and possibly earlier versions, allows remote attackers to cause a denial of service (application crash) via a string that contains malformed HTML, which causes an out-of-bounds read.

A SUSE Security advisory reports:

A bug in the readfile() function of php4 could be used to to crash the httpd running the php4 code when accessing files with a multiple of the architectures page size leading to a denial of service.

The squid patches page notes:

An inconsistent state is entered on a failed PUT/POST request making a high risk for segmentation faults or other strange errors

Secunia Advisory: SA14730

A vulnerability has been reported in Horde, which can be exploited by malicious people to conduct cross-site scripting attacks.

Input passed when setting the parent frame's page title via JavaScript is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

The vulnerability has been reported in version 3.0.4-RC2. Prior versions may also be affected.

An iDEFENSE Security Advisory reports:

Remote exploitation of an input validation vulnerability in version 2.6.2 of WU-FPTD could allow for a denial of service of the system by resource exhaustion.

The vulnerability specifically exists in the wu_fnmatch() function in wu_fnmatch.c. When a pattern containing a '*' character is supplied as input, the function calls itself recursively on a smaller substring. By supplying a string which contains a large number of '*' characters, the system will take a long time to return the results, during which time it will be using a large amount of CPU time.

A Gentoo Linux Security Advisory reports:

Tavis Ormandy of the Gentoo Linux Security Audit Team identified a flaw in the Hashcash utility that an attacker could expose by specifying a malformed reply address.

Successful exploitation would permit an attacker to disrupt Hashcash users, and potentially execute arbitrary code.

The clamav daemon is vulnerable to a DoS vulnerability due to insufficient handling of malformed zip files which can crash the clamav daemon.

Due to insecure temporary file creation in the Wine Windows emulator, it is possible for any user to read potentially sensitive information from temporary registry files.

When a Win32 application is launched by wine, wine makes a dump of the Windows registry in /tmp with name regxxxxyyyy.tmp , where xxxxxx is the pid in hexadecimal value of the current wine process and yyyy is an integer value usually equal to zero.

regxxxxyyyy.tmp is created with 0644 (-rw-r--r--) permissions. This could represent a security problem in a multi-user environment. Indeed, any local user could access to windows regstry's dump and get sensitive information, like passwords and other private data.

A Mozilla Foundation Security Advisory states:

If a user bookmarked a malicious page as a Firefox sidebar panel that page could execute arbitrary programs by opening a privileged page and injecting javascript into it.

A Mozilla Foundation Security Advisory states:

An (sic) GIF processing error when parsing the obsolete Netscape extension 2 can lead to an exploitable heap overrun, allowing an attacker to run arbitrary code on the user's machine.

The Sylpheed web site states:

A buffer overflow which occurred when replying to a message with certain headers which contain non-ascii characters was fixed.

A Gentoo Linux Security Advisory reports:

Tavis Ormandy of the Gentoo Linux Security Audit Team identified a flaw in the handling of image filenames by xv.

Successful exploitation would require a victim to process a specially crafted image with a malformed filename, potentially resulting in the execution of arbitrary code.

A KDE Security Advisory reports:

Sebastian Krahmer of the SUSE LINUX Security Team reported a local denial of service vulnerability in KDE's Desktop Communication Protocol (DCOP) daemon better known as dcopserver.

A local user can lock up the dcopserver of arbitrary other users on the same machine. This can cause a significant reduction in desktop functionality for the affected users including, but not limited to, the inability to browse the internet and the inability to start new applications.

The phpMyAdmin team reports:

Escaping of the "_" character was not properly done, giving a wildcard privilege when editing db-specific privileges with phpMyAdmin.

An Ethreal Security Advisories reports:

Issues have been discovered in the following protocol dissectors:

• Matevz Pustisek discovered a buffer overflow in the Etheric dissector. CVE: CAN-2005-0704
• The GPRS-LLC dissector could crash if the "ignore cipher bit" option was enabled. CVE: CAN-2005-0705
• Diego Giago discovered a buffer overflow in the 3GPP2 A11 dissector. This flaw was later reported by Leon Juranic. CVE: CAN-2005-0699
• Leon Juranic discovered a buffer overflow in the IAPP dissector. CVE: CAN-2005-0739
• A bug in the JXTA dissector could make Ethereal crash.
• A bug in the sFlow dissector could make Ethereal crash.

Joseph VanAndel reports that grip is vulnerability to a buffer overflow vulnerability when receiving more than 16 CDDB responses. This could lead to a crash in grip and potentially execution arbitrary code.

A workaround is to disable CDDB lookups.

SecurityFocus reports:

MySQL is reported prone to an insecure temporary file creation vulnerability.

Reports indicate that an attacker that has 'CREATE TEMPORARY TABLE' privileges on an affected installation may leverage this vulnerability to corrupt files with the privileges of the MySQL process.

MySQL is reported prone to an input validation vulnerability that can be exploited by remote users that have INSERT and DELETE privileges on the 'mysql' administrative database.

Reports indicate that this issue may be leveraged to load an execute a malicious library in the context of the MySQL process.

Finally, MySQL is reported prone to a remote arbitrary code execution vulnerability. It is reported that the vulnerability may be triggered by employing the 'CREATE FUNCTION' statement to manipulate functions in order to control sensitive data structures.

This issue may be exploited to execute arbitrary code in the context of the database process.

A rxvt-unicode changelog reports:

Fix a bug that allowed to overflow a buffer via a long escape sequence, which is probably exploitable (fix by Rob Holland / Yoann Vandoorselaere / Gentoo Audit Team).

A phpMyAdmin security announcement reports:

By calling some scripts that are part of phpMyAdmin in an unexpected way (especially scripts in the libraries subdirectory), it is possible to trigger phpMyAdmin to display a PHP error message which contains the full path of the directory where phpMyAdmin is installed.

Mitigation factor: This path disclosure is possible on servers where the recommended setting of the PHP configuration directive display_errors is set to on, which is against the recommendations given in the PHP manual.

A phpMyAdmin security announcement reports:

We received two bug reports by Maksymilian Arciemowicz about those vulnerabilities and we wish to thank him for his work. The vulnerabilities apply to those points:

1. css/phpmyadmin.css.php was vulnerable against $cfg and GLOBALS variable injections. This way, a possible attacker could manipulate any configuration parameter. Using phpMyAdmin's theming mechanism, he was able to include arbitrary files. This is especially dangerous if php is not running in safe mode.
2. A possible attacker could manipulate phpMyAdmin's localized strings via the URL and inject harmful JavaScript code this way, which could be used for XSS attacks.

Sylvain Defresne reports that libexif is vulnerable to a buffer overflow vulnerability due to insufficient input checking. This could lead crash of applications using libexif.

Neo Security Team reports:

If we specify a variable in the html code (any type: hidden, text, radio, check, etc) with the name allowhtml, allowbbcode or allowsmilies, is going to be on the html, bbcode and smilies in our signature.

This is a low risk vulnerability that allows users to bypass forum-wide configuration.

Two separate SQL injection vulnerabilites have been identified in the PostNuke PHP content management system. An attacker can use this vulnerability to potentially insert executable PHP code into the content management system (to view all files within the PHP scope, for instance). Various other SQL injection vulnerabilities exist, which give attackers the ability to run SQL queries on any tables within the database.

A cross-site scripting vulnerability is present in the PostNuke PHP content management system. By passing data injected through exploitable errors in input validation, an attacker can insert code which will run on the machine of anybody viewing the page. It is feasible that this attack could be used to retrieve session information from cookies, thereby allowing the attacker to gain administrative access to the CMS.

Two exploits have been identified in the Linux RealPlayer client. RealNetworks states:

RealNetworks, Inc. has addressed recently discovered security vulnerabilities that offered the potential for an attacker to run arbitrary or malicious code on a customer's machine. RealNetworks has received no reports of machines compromised as a result of the now-remedied vulnerabilities. RealNetworks takes all security vulnerabilities very seriously.

The specific exploits were:

• Exploit 1: To fashion a malicious WAV file to cause a buffer overflow which could have allowed an attacker to execute arbitrary code on a customer's machine.
• Exploit 2: To fashion a malicious SMIL file to cause a buffer overflow which could have allowed an attacker to execute arbitrary code on a customer's machine.

Tavis Ormandy reports:

magemagick-6.2.0-3 fixes an potential issue handling malformed filenames, the flaw may affect webapps or scripts that use the imagemagick utilities for image processing, or applications linked with libMagick.

This vulnerability could crash ImageMagick or potentially lead to the execution of arbitrary code with the permissions of the user running ImageMagick.

The uim developers reports:

Takumi ASAKI discovered that uim always trusts environment variables. But this is not correct behavior, sometimes environment variables shouldn't be trusted. This bug causes privilege escalation when libuim is linked against setuid/setgid application. Since GTK+ prohibits setuid/setgid applications, the bug appears only in 'immodule for Qt' enabled Qt. (Normal Qt is also safe.)

The lighttpd website reports:

In lighttpd 1.3.7 and below it is possible to fetch the source files which should be handled by CGI or FastCGI applications.

The vulnerability is in the handling of urlencoded trailing NUL bytes. Installations that do not use CGI or FastCGI are not affected.

The phpbb developer group reports:

phpBB Group announces the release of phpBB 2.0.13, the "Beware of the furries" edition. This release addresses two recent security exploits, one of them critical. They were reported a few days after .12 was released and no one is more annoyed than us, having to release a new version ini such a short period of time. Fortunately both fixes are easy and in each case just one line needs to be edited.

Two iDEFENSE Security Advisories reports:

An exploitable stack-based buffer overflow condition exists when using NT Lan Manager (NTLM) authentication. The problem specifically exists within Curl_input_ntlm() defined in lib/http_ntlm.c.

Successful exploitation allows remote attackers to execute arbitrary code under the privileges of the target user. Exploitation requires that an attacker either coerce or force a target to connect to a malicious server using NTLM authentication.

An exploitable stack-based buffer overflow condition exists when using Kerberos authentication. The problem specifically exists within the functions Curl_krb_kauth() and krb4_auth() defined in lib/krb4.c.

Successful exploitation allows remote attackers to execute arbitrary code under the privileges of the target user. Exploitation requires that an attacker either coerce or force a target to connect to a malicious server using Kerberos authentication.

The Cyrus IMAP Server ChangeLog states:

• Fix possible single byte overflow in mailbox handling code.
• Fix possible single byte overflows in the imapd annotate extension.
• Fix stack buffer overflows in fetchnews (exploitable by peer news server), backend (exploitable by admin), and in imapd (exploitable by users though only on platforms where a filename may be larger than a mailbox name).

The 2.1.X series are reportedly only affected by the second issue.

These issues may lead to execution of arbitrary code with the permissions of the user running the Cyrus IMAP Server.

Debian Security Advisory reports:

jaguar@felinemenace.org discovered a format string vulnerability in sup, a set of programs to synchronize collections of files across a number of machines, whereby a remote attacker could potentially cause arbitrary code to be executed with the privileges of the supfilesrv process (this process does not run automatically by default).

A Mozilla Foundation Security Advisory reports:

A predictable name is used for the plugin temporary directory. A malicious local user could symlink this to the victim's home directory and wait for the victim to run Firefox. When Firefox shuts down the victim's directory would be erased.

A Mozilla Foundation Security Advisory reports:

Plugins (such as flash) can be used to load privileged content into a frame. Once loaded various spoofs can be applied to get the user to interact with the privileged content. Michael Krax's "Fireflashing" example demonstrates that an attacker can open about:config in a frame, hide it with an opacity setting, and if the attacker can get the victim to click at a particular spot (design some kind of simple game) you could toggle boolean preferences, some of which would make further attacks easier.

The "firescrolling" example demonstrates arbitrary code execution (in this case downloading a file) by convincing the user to scroll twice.

Workaround: Disable JavaScript.

The version 0.06_1 and prior have a format string vulnerability which can be triggered by using a carefully-crafted BDF font file.

psoTFX reports:

phpBB Group are pleased to announce the release of phpBB 2.0.12 the "Horray for Furrywood" release. This release addresses a number of bugs and a couple of potential exploits. [...] one of the potential exploits addressed in this release could be serious in certain situations and thus we urge all users, as always, to upgrade to this release as soon as possible. Mostly this release is concerned with eliminating disclosures of information which while useful in debug situations may allow third parties to gain information which could be used to do harm via unknown or unfixed exploits in this or other applications.

The ChangeLog for phpBB 2.0.12 states:

• Prevented full path display on critical messages
• Fixed full path disclosure in username handling caused by a PHP 4.3.10 bug - AnthraX101
• Added exclude list to unsetting globals (if register_globals is on) - SpoofedExistence
• Fixed arbitrary file disclosure vulnerability in avatar handling functions - AnthraX101
• Fixed arbitrary file unlink vulnerability in avatar handling functions - AnthraX101
• Fixed path disclosure bug in search.php caused by a PHP 4.3.10 bug (related to AnthraX101's discovery)
• Fixed path disclosure bug in viewtopic.php caused by a PHP 4.3.10 bug - matrix_killer

Ulf Härnhammar reports multiple security vulnerabilities in unace-1.2b:

• There are buffer overflows when extracting, testing or listing specially prepared ACE archives.
• There are directory traversal bugs when extracting ACE archives.
• There are also buffer overflows when dealing with long (>17000 characters) command line arguments.

Simon Tatham reports:

This version fixes a security hole in previous versions of PuTTY, which can allow a malicious SFTP server to attack your client. If you use either PSCP or PSFTP, you should upgrade. Users of the main PuTTY program are not affected. (However, note that the server must have passed host key verification before this attack can be launched, so a man-in-the-middle shouldn't be able to attack you if you're careful.)

Davide Madrisan reports:

The `dcopidlng' script in the KDE library package (kdelibs-3.3.2/dcop/dcopidlng/dcopidlng) creates temporary files in a unsecure manner.

Note: dcopidlng is only used at build time, so only users installing KDE are vulnerable, not users already running KDE.

A Debian Security Advisory reports:

Ulf Härnhammer from the Debian Security Audit Project discovered a format string vulnerability in bidwatcher, a tool for watching and bidding on eBay auctions. This problem can be triggered remotely by a web server of eBay, or someone pretending to be eBay, sending certain data back.

A Debian Security Advisory reports:

Albert Puigsech Galicia discovered a directory traversal vulnerability in a proprietary FTP client (CAN-2004-1376) which is also present in gftp, a GTK+ FTP client. A malicious server could provide a specially crafted filename that could cause arbitrary files to be overwritten or created by the client.

A Secunia Advisory reports:

Michael Holzt has discovered a vulnerability in Opera, which can be exploited by malicious people to trick users into executing malicious files.

The vulnerability is caused due to an error in the processing of "data:" URIs, causing wrong information to be shown in a download dialog. This can be exploited by e.g. a malicious website to trick users into executing a malicious file by supplying a specially crafted "data:" URI.

Giovanni Delvecchio reports:

Opera for linux uses "kfmclient exec" as "Default Application" to handle saved files. This could be used by malicious remote users to execute arbitrary shell commands on a target system.

The PL/PgSQL parser in postgresql is vulnerable to several buffer overflows. These could be exploited by a remote attacker to execute arbitrary code with the permissions of the postgresql server by running a specially crafted query.

Several input validation errors exist in AWStats that allow a remote unauthenticated attacker to execute arbitrary commands with the priviliges of the web server. These programming errors involve CGI parameters including loadplugin, logfile, pluginmode, update, and possibly others.

Additionally, the debug and other CGI parameters may be used to cause AWStats to disclose AWStats and system configuration information.

PowerDNS is vulnerable to a temporary denial-of-service vulnerability that can be triggered using a random stream of bytes.

Max Vozeler discovered several format string vulnerabilities in the movemail utility of Emacs. They can be exploited when connecting to a malicious POP server and can allow an attacker can execute arbitrary code under the privileges of the user running Emacs.

A No System Group security advisory reports that ngircd is vulnerable to a format string vulnerability in the Log_Resolver() function of log.c, if IDENT support is enabled. This could allow a remote attacker to execute arbitrary code with the permissions of the ngircd daemon, which is root by default.

Note: By default the FreeBSD ngircd port does not enable IDENT support.

Florian Westphal discovered a buffer overflow in ngircd which can be used remotely crash the server and possibly execute arbitrary code.

Mark J Cox reports:

Graham Dumpleton discovered a flaw which can affect anyone using the publisher handle of the Apache Software Foundation mod_python. The publisher handle lets you publish objects inside modules to make them callable via URL. The flaw allows a carefully crafted URL to obtain extra information that should not be visible (information leak).

A directory traversal vulnerability in mailman allow remote attackers to read arbitrary files due to inadequate input sanitizing. This could, among other things, lead remote attackers to gaining access to the mailman configuration database (which contains subscriber email addresses and passwords) or to the mail archives for private lists.

Erik Sjölund discovered several issues in enscript: it suffers from several buffer overflows, quotes and shell escape characters are insufficiently sanitized in filenames, and it supported taking input from an arbitrary command pipe, with unwanted side effects.

John Heasman and others disovered that non-privileged users could use the LOAD extension to load arbitrary libraries into the postgres server process space. This could be used by non-privileged local users to execute arbitrary code with the privileges of the postgresql server.

An Ethreal Security Advisories reports:

Issues have been discovered in the following protocol dissectors:

• The COPS dissector could go into an infinite loop. CVE: CAN-2005-0006
• The DLSw dissector could cause an assertion. CVE: CAN-2005-0007
• The DNP dissector could cause memory corruption. CVE: CAN-2005-0008
• The Gnutella dissector could cuase an assertion. CVE: CAN-2005-0009
• The MMSE dissector could free statically-allocated memory. CVE: CAN-2005-0010
• The X11 dissector is vulnerable to a string buffer overflow. CVE: CAN-2005-0084

Impact: It may be possible to make Ethereal crash or run arbitrary code by injecting a purposefully malformed packet onto the wire or by convincing someone to read a malformed packet trace file.

The squid patches page notes:

This patch addresses a HTTP protocol mismatch related to oversized reply headers. In addition it enhances the cache.log reporting on reply header parsing failures to make it easier to track down which sites are malfunctioning.

It is believed that this bug may lead to cache pollution or allow access controls to be bypassed.

According to Python Security Advisory PSF-2005-001,

The Python development team has discovered a flaw in the SimpleXMLRPCServer library module which can give remote attackers access to internals of the registered object or its module or possibly other modules. The flaw only affects Python XML-RPC servers that use the register_instance() method to register an object without a _dispatch() method. Servers using only register_function() are not affected.

On vulnerable XML-RPC servers, a remote attacker may be able to view or modify globals of the module(s) containing the registered instance's class(es), potentially leading to data loss or arbitrary code execution. If the registered object is a module, the danger is particularly serious. For example, if the registered module imports the os module, an attacker could invoke the os.system() function.

Note: This vulnerability affects your system only if you're running SimpleXMLRPCServer-based server. This isn't harmful at all if you don't run any internet server written in Python or your server doesn't serve in XML-RPC protocol.

Kevin Finisterre discovered bugs in perl's I/O debug support:

• The environmental variable PERLIO_DEBUG is honored even by the set-user-ID perl command (usually named sperl or suidperl). As a result, a local attacker may be able to gain elevated privileges. (CAN-2005-0155)
• A buffer overflow may occur in threaded versions of perl when the full pathname of the script being executed is very long. (CAN-2005-0156).

Note: By default, no set-user-ID perl binary is installed. An administrator must enable it manually at build time with the ENABLE_SUIDPERL port flag.

The newsgrab script uses insecure permissions during the creation of the local output directory and downloaded files.

After a file is created, permissions on it are set using the mode value of the newsgroup posting. This can potentially be a problem when the mode is not restrictive enough. In addition, the output directory is created with world writable permissions allowing other users to drop symlinks or other files at that location.

The newsgrab script creates files by using the names provided in the newsgroup messages in a perl open() call. This is done without performing any security checks to prevent a directory traversal. A specially crafted newsgroup message could cause newsgrab to drop an attachment anywhere on the file system using the permissions of the user running the script.

The newspost program uses a function named socket_getline to read server responses from the network socket. Unfortunately this function does not check the length of the buffer in which the read data is stored and only stops reading when a newline character is found.

A malicious NNTP server could use this bug to cause a buffer overflow by sending an overly long response. Such an overflow allows arbitrary code to be executed, with the privileges of the newspost process, on the affected systems.

The newsfetch program uses the sscanf function to read information from server responses into static memory buffers. Unfortunately this is done without any proper bounds checking. As a result long server responses may cause an overflow when a newsgroup listing is requested from an NNTP server.

According to the Squid Proxy Cache Security Update Advisory SQUID-2005:3,

The WCCP recvfrom() call accepts more data than will fit in the allocated buffer. An attacker may send a larger-than-normal WCCP message to Squid and overflow this buffer.

Severity:

The bug is important because it allows remote attackers to crash Squid, causing a disription in service. However, the bug is exploitable only if you have configured Squid to send WCCP messages to, and expect WCCP replies from, a router.

Sites that do not use WCCP are not vulnerable.

Note that while the default configuration of the FreeBSD squid port enables WCCP support in general, the default configuration supplied does not actually configure squid to send and receive WCCP messages.

An iDEFENSE Security Advisory reports:

Remote exploitation of a buffer overflow vulnerability in the xpdf PDF viewer included in multiple Unix and Linux distributions could allow for arbitrary code execution as the user viewing a PDF file.

The vulnerability specifically exists due to insufficient bounds checking while processing a PDF file that provides malicious values in the /Encrypt /Length tag. The offending code can be found in the Decrypt::makeFileKey2 function in the source file xpdf/Decrypt.cc.

Martin Joey Schulze reports:

Erik Sjöund discovered that zhcon, a fast console CJK system using the Linux framebuffer, accesses a user-controlled configuration file with elevated privileges. Thus, it is possible to read arbitrary files.

When installed from the FreeBSD Ports Collection, zhcon is installed set-user-ID root.

Martin Joey Schulze reports:

Max Vozeler discovered an integer overflow in the helper application camel-lock-helper which runs setuid root or setgid mail inside of Evolution, a free groupware suite. A local attacker can cause the setuid root helper to execute arbitrary code with elevated privileges via a malicious POP server.

An LSS Security Advisory reports:

When a denial of service attack is detected, mod_dosevasive will, among other things, create a temporary file which it will use to trace actions from the offensive IP address. This file is insecurely created in /tmp and it's name is easily predictable.

It is then easy for an attacker to create arbitrary files in any directory that the user under which apache runs has privileges to write.

[...] once the target file is opened, there is a race attack (although difficult to exploit) which can lead to mod_dosevasive overwriting any file that the user under which apache runs has privileges to write.

The squid patches page notes:

This patch makes Squid considerably stricter while parsing the HTTP protocol.

1. A Content-length header should only appear once in a valid request or response. Multiple Content-length headers, in conjunction with specially crafted requests, may allow Squid's cache to be poisioned with bad content in certain situations.
2. CR characters is only allowed as part of the CR NL line terminator, not alone. This to ensure that all involved agrees on the structure of HTTP headers.
3. Rejects requests/responses that have whitespace in an HTTP header name.

To enable these strict parsing rules, update to at least squid-2.5.7_9 and specify relaxed_header_parser off in squid.conf.

A Bugzilla advisory states:

This advisory covers a single cross-site scripting issue that has recently been discovered and fixed in the Bugzilla code: If a malicious user links to a Bugzilla site using a specially crafted URL, a script in the error page generated by Bugzilla will display the URL unaltered in the page, allowing scripts embedded in the URL to execute.

A Secunia Research advisory reports:

Secunia Research has reported a vulnerability in multiple browsers, which can be exploited by malicious people to spoof the content of websites.

The problem is that a website can inject content into another site's window if the target name of the window is known. This can e.g. be exploited by a malicious website to spoof the content of a pop-up window opened on a trusted website.

Secunia has constructed a test, which can be used to check if your browser is affected by this issue: http://secunia.com/multiple_browsers_window_injection_vulnerability_test/

A workaround for Mozilla-based browsers is available.

Manigandan Radhakrishnan discovered a security vulnerability in YAMT which can lead to execution of arbitrary commands with the privileges of the user running YAMT when sorting based on MP3 tags. The problem exist in the id3tag_sort() routine which does not properly sanitize the artist tag from the MP3 file before using it as an argument to the mv command.

According to a whitepaper published by Sanctum, Inc., it is possible to mount cache poisoning attacks against, among others, squid proxies by inserting false replies into the HTTP stream.

The squid patches page notes:

This patch additionally strengthens Squid from the HTTP response attack described by Sanctum.

A Hyperdose Security Advisory reports:

Horde contains two XSS attacks that can be exploited through GET requests. Once exploited, these requests could be used to execute any javascript commands in the context of that user, potentially including but not limited to reading and deleting email, and stealing auth tokens.

Andrew V. Samoilov reported several vulnerabilities that were corrected in MidnightCommand 4.6.0:

• Format string issues (CAN-2004-1004)
• Buffer overflows (CAN-2004-1005)
• Denial-of-service, infinite loop (CAN-2004-1009)
• Denial-of-service, corrupted section header (CAN-2004-1090)
• Denial-of-service, null pointer dereference (CAN-2004-1091)
• Freeing unallocated memory (CAN-2004-1092)
• Using already freed memory (CAN-2004-1093)

Jeroen van Wolffelaar reports that the Perl module File::Path contains a race condition wherein traversed directories and files are temporarily made world-readable/writable.

Marc Schoenefeld reports:

Opera 7.54 is vulnerable to leakage of the java sandbox, allowing malicious applets to gain unacceptable privileges. This allows them to be used for information gathering (spying) of local identity information and system configurations as well as causing annoying crash effects.

Opera 754 [sic] which was released Aug 5,2004 is vulnerable to the XSLT processor covert channel attack, which was corrected with JRE 1.4.2_05 [released in July 04], but in disadvantage to the users the opera packaging guys chose to bundle the JRE 1.4.2_04 [...]

Internal pointer DoS exploitation: Opera.jar contains the opera replacement of the java plugin. It therefore handles communication between javascript and the Java VM via the liveconnect protocol. The public class EcmaScriptObject exposes a system memory pointer to the java address space, by constructing a special variant of this type an internal cache table can be polluted by false entries that infer proper function of the JSObject class and in the following proof-of-concept crash the browser.

Exposure of location of local java installation Sniffing the URL classpath allows to retrieve the URLs of the bootstrap class path and therefore the JDK installation directory.

Exposure of local user name to an untrusted applet An attacker could use the sun.security.krb5.Credentials class to retrieve the name of the currently logged in user and parse his home directory from the information which is provided by the thrown java.security.AccessControlException.

A sudo bug report says:

sudo doesn't unset the CDPATH variable, which leads to possible security problems.

An iDEFENSE Security Advisory states:

Multiple vulnerabilities have been found in Fcron.

1. File contents disclosure
2. Configuration Bypass Vulnerability
3. File Removal and Empty File Creation Vulnerability
4. Information Disclosure Vulnerability

An NGSSoftware Insight Security Research Advisory reports:

Two vulnerabilities have been discovered in RealPlayer which may potentially be leveraged to allow remote code execution, or may used in combination with the Real Metadata Package File Deletion vulnerability to reliably delete files from a users system.

Pavel Kankovsky reports:

Imlib affected by a variant of CAN-2004-0782 too.

I've discovered more vulnerabilities in Imlib (1.9.13). In particular, it appears to be affected by a variant of Chris Evans' libXpm flaw #1 (CAN-2004-0782, see http://scary.beasts.org/security/CESA-2004-003.txt). Look at the attached image, it kills ee on my 7.3.

The flaws also affect imlib2.

eGroupWare contains a bug in the JiNN component that allows a remote attacker to download arbitrary files.

An advisory published by Richard Stanway describes numerous critical vulnerabilities in the Quake II engine:

Due to unchecked input at various stages in the server, remote users are able to cause the server to crash, reveal sensitive information or potentially execute arbitrary code.

Konversation comes with Perl scripts that do not properly escape shell characters on executing a script. This makes it possible to attack Konversation with shell script command injection.

The LDAP authentication helper did not strip leading or trailing spaces from the login name. According to the squid patches page:

LDAP is very forgiving about spaces in search filters and this could be abused to log in using several variants of the login name, possibly bypassing explicit access controls or confusing accounting.

Workaround: Block logins with spaces

	    acl login_with_spaces proxy_auth_regex [:space:]
		    http_access deny login_with_spaces
	    

Kenshi Muto discovered that the CUPS server would enter an infinite loop when processing a URL containing /...

A US-CERT vulnerability note reports:

An Integer overflow in the LibTIFF library may allow a remote attacker to cause a divide-by-zero error that results in a denial-of-service condition.

infamous41md reports:

zgv uses malloc() frequently to allocate memory for storing image data. When calculating how much to allocate, user supplied data from image headers is multiplied and/or added without any checks for arithmetic overflows. We can overflow numerous calculations, and cause small buffers to be allocated. Then we can overflow the buffer, and eventually execute code. There are a total of 11 overflows that are exploitable to execute arbitrary code.

These bugs exist in both zgv and xzgv.

In a Mozilla bug report, Daniel Kleinsinger writes:

I was comparing treatment of attachments opened directly from emails on different platforms. I discovered that Linux builds save attachments in /tmp with world readable rights. This doesn't seem like a good thing. Couldn't someone else logged onto the same machine read your attachments?

This could expose the contents of downloaded files or email attachments to other users on a multi-user system.

An iDEFENSE Security Advisory reports:

Remote exploitation of an input validation vulnerability in AWStats allows attackers to execute arbitrary commands under the privileges of the web server.

The problem specifically exists when the application is running as a CGI script on a web server. The "configdir" parameter contains unfiltered user-supplied data that is utilized in a call to the Perl routine open()...

Successful exploitation allows remote attackers to execute arbitrary commands under the privileges of the web server. This can lead to further compromise as it provides remote attackers with local access.

An iDEFENSE Security Advisory reports:

Remote exploitation of a buffer overflow vulnerability in The ImageMagick's Project's ImageMagick PSD image-decoding module could allow an attacker to execute arbitrary code.

Exploitation may allow attackers to run arbitrary code on a victim's computer if the victim opens a specially formatted image. Such images could be delivered by e-mail or HTML, in some cases, and would likely not raise suspicion on the victim's part. Exploitation is also possible when a web-based application uses ImageMagick to process user-uploaded image files.

D. J. Bernstein reports that Bartlomiej Sieka has discovered several security vulnerabilities in lppasswd, which is part of CUPS. In the following excerpt from Bernstein's email, CVE names have been added for each issue:

First, lppasswd blithely ignores write errors in fputs(line,outfile) at lines 311 and 315 of lppasswd.c, and in fprintf(...) at line 346. An attacker who fills up the disk at the right moment can arrange for /usr/local/etc/cups/passwd to be truncated. (CAN-2004-1268)

Second, if lppasswd bumps into a file-size resource limit while writing passwd.new, it leaves passwd.new in place, disabling all subsequent invocations of lppasswd. Any local user can thus disable lppasswd... (CAN-2004-1269)

Third, line 306 of lppasswd.c prints an error message to stderr but does not exit. This is not a problem on systems that ensure that file descriptors 0, 1, and 2 are open for setuid programs, but it is a problem on other systems; lppasswd does not check that passwd.new is different from stderr, so it ends up writing a user-controlled error message to passwd if the user closes file descriptor 2. (CAN-2004-1270)

Note: The third issue, CAN-2004-1270, does not affect FreeBSD 4.6-RELEASE or later systems, as these systems ensure that the file descriptors 0, 1, and 2 are always open for set-user-ID and set-group-ID programs.

Ariel Berkman has discovered a buffer overflow vulnerability in CUPS's HPGL input driver. This vulnerability could be exploited to execute arbitrary code with the permission of the CUPS server by printing a specially crated HPGL file.

The Debian Security Team reports:

Javier Fernández-Sanguino Peña from the Debian Security Audit Project discovered a temporary file vulnerability in the mysqlaccess script of MySQL that could allow an unprivileged user to let root overwrite arbitrary files via a symlink attack and could also could unveil the contents of a temporary file which might contain sensitive information.

Yosef Klein and Limin Wang have found a buffer overflow vulnerability in unrtf that can allow an attacker to execute arbitrary code with the permissions of the user running unrtf, by running unrtf on a specially crafted rtf document.

Maurycy Prodeus reports a critical vulnerability in Mozilla-based browsers:

Mozilla browser supports NNTP urls. Remote side is able to trigger news:// connection to any server. I found a flaw in NNTP handling code which may cause heap overflow and allow remote attacker to execute arbitrary code on client machine.

Yuri D'Elia has found a buffer overflow vulnerability in mpg123's parsing of frame headers in input streams. This vulnerability can potentially lead to execution of arbitrary code with the permissions of the user running mpg123, if the user runs mpg123 on a specially crafted MP2 or MP3 file.

The squid patches page notes:

WCCP_I_SEE_YOU messages contain a 'number of caches' field which should be between 1 and 32. Values outside that range may crash Squid if WCCP is enabled, and if an attacker can spoof UDP packets with the WCCP router's IP address.

The squid patches page notes:

A malicious gopher server may return a response with very long lines that cause a buffer overflow in Squid.

Workaround: Since gopher is very obscure these days, do not allow Squid to any gopher servers. Use an ACL rule like:

acl Gopher proto gopher
http_access deny Gopher

A xine security announcement states:

A heap overflow has been found in the DVD subpicture decoder of xine-lib. This can be used for a remote heap overflow exploit, which can, on some systems, lead to or help in executing malicious code with the permissions of the user running a xine-lib based media application.

A xine security announcement states:

Several string overflows on the stack have been fixed in xine-lib, some of them can be used for remote buffer overflow exploits leading to the execution of arbitrary code with the permissions of the user running a xine-lib based media application.

Stack-based string overflows have been found:

1. in the code which handles VideoCD MRLs
2. in VideoCD code reading the disc label
3. in the code which parses text subtitles and prepares them for display

A xine security announcement states:

Multiple vulnerabilities have been found and fixed in the Real-Time Streaming Protocol (RTSP) client for RealNetworks servers, including a series of potentially remotely exploitable buffer overflows. This is a joint advisory by the MPlayer and xine teams as the code in question is common to these projects.

Severity: High (arbitrary remote code execution under the user ID running the player) when playing Real RTSP streams. At this time, there is no known exploit for these vulnerabilities.

A flaw in HylaFAX may allow an attacker to bypass normal authentication by spoofing their DNS PTR records.

Steve Kemp has found buffer overflows in the handling of the command line flag -KCONV and the XSHISENLIB environment variable. Ulf Härnhammer has detected an unbounded copy from the GECOS field to a char array. All overflows can be exploited to gain group games privileges.

The setuid root elvprsv utility, used to preserve recovery helvis files, can be abused by local users to delete with root privileges.

The problem is that elvprsv deletes files when it thinks they have become corrupt. When elvprsv is pointed to a normal file then it will almost always think the file is corrupt and deletes it. This behavior may be exploited by local attackers to delete critical files.

Once a recovery file has been preserved by the setuid root elvprsv utility it is placed in a worldreadable directory with worldreadable permissions. This possibly allows sensitive information to leak.

In addition to this information leak, it is possible for users to recover files that belong to other users by using elvrec, another setuid root binary.

dillo contains a format string vulnerability which could lead to execution of arbitrary code simply by viewing a web page or opening a HTML file.

When downloading a batch of files from an FTP server the mget command does not check for directory escapes. A specially crafted file on the FTP server could then potentially overwrite an existing file of the user.

Dmitry V. Levin found a potential integer overflow in the tiffdump utility which could lead to execution of arbitrary code. This could be exploited by tricking an user into executing tiffdump on a specially crafted tiff image.

In an iDEFENSE Security Advisory infamous41md reports:

Remote exploitation of a heap-based buffer overflow vulnerability within the LibTIFF package could allow attackers to execute arbitrary code.

The vulnerability specifically exists due to insufficient validation of user-supplied data when calculating the size of a directory entry. A TIFF file includes a number of directory entry header fields that describe the data in the file. Included in these entries is an entry count and offset value that are calculated to determine the size and location of the data for that entry.

Ciaran McCreesh discovered news ways in which a VIM modeline can be used to trojan a text file. The patch by Bram Moolenaar reads:

Problem: Unusual characters in an option value may cause unexpected behavior, especially for a modeline. (Ciaran McCreesh)

Solution: Don't allow setting termcap options or 'printdevice' or 'titleold' in a modeline. Don't list options for "termcap" and "all" in a modeline. Don't allow unusual characters in 'filetype', 'syntax', 'backupext', 'keymap', 'patchmode' and 'langmenu'.

Note: It is generally recommended that VIM users use set nomodeline in ~/.vimrc to avoid the possibility of trojaned text files.

Danny Lungstrom has found two buffer overflow vulnerabilities in pcal which can lead to execution of arbitrary code by making a user run pcal on a specially crafted calendar file.

1. The function host_aton() can overflow a buffer if it is presented with an illegal IPv6 address that has more than 8 components.

2. The second report described a buffer overflow in the function spa_base64_to_bits(), which is part of the code for SPA authentication.

A buffer overflow vulnerability exists in the playlist processing of mpg123. A specially crafted playlist entry can cause a stack overflow that can be used to inject arbitrary code into the mpg123 process

Note that a malicious playlist, demonstrating this vulnerability, was released by the bug finder and may be used as a template by attackers.

A buffer overflow vulnerability has been detected in the greed URL handling code. This bug can especially be a problem when greed is used to process GRX (GetRight) files that originate from untrusted sources.

The bug finder, Manigandan Radhakrishnan, gave the following description:

Here are the bugs. First, in main.c, DownloadLoop() uses strcat() to copy an input filename to the end of a 128-byte COMMAND array. Second, DownloadLoop() passes the input filename to system() without checking for special characters such as semicolons.

Two buffer overflow vulnerabilities where detected. Both issues can be used by local users to gain group games privileges on affected systems.

The first overflow exists in the map name handling and can be triggered when a very long name is given to the program during command-line execution

The second overflow exists in the username processing while writing the players score to disk. Excessivly long usernames, set via the USER environment variable, are stored without any length checks in a memory buffer.

Timo Sirainen reports:

There are various bugs in up-imapproxy which can crash it. Since up-imapproxy runs in a single process with each connection handled in a separate thread, any crash kills all the connections and stops listening for new ones.

In 64bit systems it might be possible to make it leak data (mails, passwords, ..) from other connections to attacker's connection. However I don't think up-imapproxy actually works in any 64bit system so this is just a theoretical problem.

Albert Puigsech Galicia reports that Konqueror (more specifically kio_ftp) and Microsoft Internet Explorer are vulnerable to a FTP command injection vulnerability which can be exploited by tricking an user into clicking a specially crafted FTP URI.

It is also reported by Ian Gulliver and Emanuele Balla that this vulnerability can be used to tricking a client into sending out emails without user interaction.

A Secunia Security Advisory reports that Javier Fernández-Sanguino Peña has found temporary file creation vulnerabilities in the fixps and psmandup scripts which are part of a2ps. These vulnerabilities could lead to an attacker overwriting arbitrary files with the credentials of the user running the vulnerable scripts.

Due to a buffer overflow in the open_aiff_file function in demux_aiff.c, a remote attacker is able to execute arbitrary code via a modified AIFF file.

José Antonio Calvo discovered a bug in the Jabber 1.x server. According to Matthias Wimmer:

Without this patch, it is possible to remotly crash jabberd14, if there is access to one of the following types of network sockets:

• Socket accepting client connections
• Socket accepting connections from other servers
• Socket connecting to an other Jabber server
• Socket accepting connections from server components
• Socket connecting to server components

This is any socket on which the jabberd server parses XML!

The problem existed in the included expat XML parser code. This patch removes the included expat code from jabberd14 and links jabberd against an installed version of expat.

Applying an empty ACL list results in unexpected behavior: anything will match an empty ACL list. For example,

The meaning of the configuration gets very confusing when we encounter empty ACLs such as

acl something src "/path/to/empty_file.txt"
http_access allow something somewhere

gets parsed (with warnings) as

http_access allow somwhere

And similarily if you are using proxy_auth acls without having any auth schemes defined.

An Ethreal Security Advisories reports:

Issues have been discovered in the following protocol dissectors:

• Matthew Bing discovered a bug in DICOM dissection that could make Ethereal crash.
• An invalid RTP timestamp could make Ethereal hang and create a large temporary file, possibly filling available disk space.
• The HTTP dissector could access previously-freed memory, causing a crash.
• Brian Caswell discovered that an improperly formatted SMB packet could make Ethereal hang, maximizing CPU utilization.

Impact: It may be possible to make Ethereal crash or run arbitrary code by injecting a purposefully malformed packet onto the wire or by convincing someone to read a malformed packet trace file.

An iDEFENSE Security Advisory reports:

Remote exploitation of a buffer overflow vulnerability in the xpdf PDF viewer, as included in multiple Linux distributions, could allow attackers to execute arbitrary code as the user viewing a PDF file. The offending code can be found in the Gfx::doImage() function in the source file xpdf/Gfx.cc.

An iDEFENSE Security Advisory reports:

Remote exploitation of a buffer overflow in version 5.09 of Adobe Acrobat Reader for Unix could allow for execution of arbitrary code.

The vulnerability specifically exists in a the function mailListIsPdf(). This function checks if the input file is an email message containing a PDF. It unsafely copies user supplied data using strcat into a fixed sized buffer.

A Debian security advisory reports:

A problem has been discovered in ecartis, a mailing-list manager, which allows an attacker in the same domain as the list admin to gain administrator privileges and alter list settings.

iDEFENSE and the MPlayer Team have found multiple vulnerabilities in MPlayer:

• Potential heap overflow in Real RTSP streaming code
• Potential stack overflow in MMST streaming code
• Multiple buffer overflows in BMP demuxer
• Potential heap overflow in pnm streaming code
• Potential buffer overflow in mp3lib

These vulnerabilities could allow a remote attacker to execute arbitrary code as the user running MPlayer. The problem in the pnm streaming code also affects xine.

A MIT krb5 Security Advisory reports:

The MIT Kerberos 5 administration library (libkadm5srv) contains a heap buffer overflow in password history handling code which could be exploited to execute arbitrary code on a Key Distribution Center (KDC) host. The overflow occurs during a password change of a principal with a certain password history state. An administrator must have performed a certain password policy change in order to create the vulnerable state.

An authenticated user, not necessarily one with administrative privileges, could execute arbitrary code on the KDC host, compromising an entire Kerberos realm.

Greg MacManus, iDEFENSE Labs reports:

Remote exploitation of an integer overflow vulnerability in the smbd daemon included in Samba 2.0.x, Samba 2.2.x, and Samba 3.0.x prior to and including 3.0.9 could allow an attacker to cause controllable heap corruption, leading to execution of arbitrary commands with root privileges.

Successful remote exploitation allows an attacker to gain root privileges on a vulnerable system. In order to exploit this vulnerability an attacker must possess credentials that allow access to a share on the Samba server. Unsuccessful exploitation attempts will cause the process serving the request to crash with signal 11, and may leave evidence of an attack in logs.

Secunia reports:

Multiple vulnerabilities have been reported in PHP, which can be exploited to gain escalated privileges, bypass certain security restrictions, gain knowledge of sensitive information, or compromise a vulnerable system.

When a user is granted access to a database with a name containing an underscore and the underscore is not escaped then that user might also be able to access other, similarly named, databases on the affected system.

The problem is that the underscore is seen as a wildcard by MySQL and therefore it is possible that an admin might accidently GRANT a user access to multiple databases.

Dean Ellis reported a denial of service vulnerability in the MySQL server:

Multiple threads ALTERing the same (or different) MERGE tables to change the UNION eventually crash the server or hang the individual threads.

Note that a script demonstrating the problem is included in the MySQL bug report. Attackers that have control of a MySQL account can easily use a modified version of that script during an attack.

A special crafted MySQL FTS request can cause the server to crash. Malicious MySQL users can abuse this bug in a denial of service attack against systems running an affected MySQL daemon.

Note that because this bug is related to the parsing of requests, it may happen that this bug is triggered accidently by a user when he or she makes a typo.

The mysql_real_connect function doesn't properly handle DNS replies by copying the IP address into a buffer without any length checking. A specially crafted DNS reply may therefore be used to cause a buffer overflow on affected systems.

Note that whether this issue can be exploitable depends on the system library responsible for the gethostbyname function. The bug finder, Lukasz Wojtow, explaines this with the following words:

In glibc there is a limitation for an IP address to have only 4 bytes (obviously), but generally speaking the length of the address comes with a response for dns query (i know it sounds funny but read rfc1035 if you don't believe). This bug can occur on libraries where gethostbyname function takes length from dns's response

A Red Hat advisory reports:

Oleksandr Byelkin discovered that "ALTER TABLE ... RENAME" checked the CREATE/INSERT rights of the old table instead of the new one.

Table access restrictions, on the affected MySQL servers, may accidently or intentially be bypassed due to this bug.

A phpMyAdmin security announcement reports:

Command execution: since phpMyAdmin 2.6.0-pl2, on a system where external MIME-based transformations are activated, an attacker can put into MySQL data an offensive value that starts a shell command when browsed.

Enabling PHP safe mode on the server can be used as a workaround for this vulnerability.

A phpMyAdmin security announcement reports:

File disclosure: on systems where the UploadDir mecanism is active, read_dump.php can be called with a crafted form; using the fact that the sql_localfile variable is not sanitized can lead to a file disclosure.

Enabling PHP safe mode on the server can be used as a workaround for this vulnerability.

Jan Minar reports that there exists multiple vulnerabilities in wget:

Wget erroneously thinks that the current directory is a fair game, and will happily write in any file in and below it. Malicious HTTP response or malicious HTML file can redirect wget to a file that is vital to the system, and wget will create/append/overwrite it.

Wget apparently has at least two methods of ``sanitizing'' the potentially malicious data it receives from the HTTP stream, therefore a malicious redirects can pass the check. We haven't find a way to trick wget into writing above the parent directory, which doesn't mean it's not possible.

Malicious HTTP response can overwrite parts of the terminal so that the user will not notice anything wrong, or will believe the error was not fatal.

When browsing SMB shares with Konqueror, shares with authentication show up with hidden password in the browser bar. It is possible to store the URL as a shortcut on the desktop where the password is then available in plain text.

A malformed Referer header field causes the Apache ap_parse_uri_components function to discard it with the result that a pointer is not initialized. The mod_access_referer module does not take this into account with the result that it may use such a pointer.

The null pointer vulnerability may possibly be used in a remote denial of service attack against affected Apache servers.

The squid-2.5 patches pages notes:

In certain conditions Squid returns random data as error messages in response to malformed host name, possibly leaking random internal information which may come from other requests.

The hide_cvsroot and forbidden configuration options are not properly honored by viewcvs when exporting to a tar file which can lead to information leakage.

cscope is vulnerable to a symlink attack which could lead to an attacker overwriting arbitrary files with the permissions of the user running cscope.

A LSS Security Advisory reports:

There is a buffer overflow vulnerability in getnickuserhost() function that is called when BNC is processing response from IRC server.

Vulnerability can be exploited if attacker tricks user to connect to his fake IRC server that will exploit this vulnerability. If the attacker has access to BNC proxy server, this vulnerability can be used to gain shell access on machine where BNC proxy server is set.

Jason Wies identified both rssh & scponly have a vulnerability that allows arbitrary command execution. He reports:

The problem is compounded when you recognize that the main use of rssh and scponly is to allow file transfers, which in turn allows a malicious user to transfer and execute entire custom scripts on the remote machine.

The environment variable HOME is copied without regard to buffer size, which can be used to gain elevated privilege if the binary is installed setgid games, and a string is read from the high score file without bounds check.

The port installs the binary without setgid, but with a world-writable high score file.

A HexView security advisory reports:

When zip performs recursive folder compression, it does not check for the length of resulting path. If the path is too long, a buffer overflow occurs leading to stack corruption and segmentation fault. It is possible to exploit this vulnerability by embedding a shellcode in directory or file name. While the issue is not of primary concern for regular users, it can be critical for environments where zip archives are re-compressed automatically using Info-Zip application.

If non-root access is enabled in sudoscript, any member of the ssers group can send a SIGHUP signal to any process.

Caused by improper bounds-checking of username and password in the C2S module, it is possible for an attacker to cause a remote buffer overflow. The server directly handles the userinput with SQL backend functions - malicious input may lead to buffer overflow.

Donato Ferrante reported an exploitable buffer overflow in this software package. Any user that can login with 'admin' privileges can abuse it, trough the $RedirectAll command, to execute arbitrary code.

Ludwig Nussel has discovered a buffer overflow vulnerability in unarj's handling of long filenames which could potentially lead to execution of arbitrary code with the permissions of the user running unarj.

unarj has insufficient checks for filenames that contain ... This can allow an attacker to overwrite arbitrary files with the permissions of the user running unarj.

The Sun Java Plugin capability in Java 2 Runtime Environment (JRE) 1.4.2_01, 1.4.2_04, and possibly earlier versions, does not properly restrict access between Javascript and Java applets during data transfer, which allows remote attackers to load unsafe classes and execute arbitrary code.

Buffer overflow vulnerabilities have been reported to exist in this software package. The vulnerabilities can be triggered by a remote server and can be used to inject malicious code in the ProZilla process.

To support MULTIAPPENDS the cmd_append handler uses the global stage array. This array is one of the things that gets destructed when the fatal() function is triggered. When the Cyrus IMAP code adds new entries to this array this is done with the help of the postfix increment operator in combination with memory allocation functions. The increment is performed on a global variable counting the number of allocated stages. Because the memory allocation function can fail and therefore internally call fatal() this construct is undefined arcording to ANSI C. This means that it is not clearly defined if the numstage counter is already increased when fatal() is called or not. While older gcc versions increase the counter after the memory allocation function has returned, on newer gcc versions (3.x) the counter gets actually increased before. In such a case the stage destructing process will try to free an uninitialised and maybe attacker supplied pointer. Which again could lead to remote code execution. (Because it is hard for an attacker to let the memory allocation functions fail in the right moment no PoC code for this problem was designed)

The argument parser of the fetch command suffers a bug very similiar to the partial command problem. Arguments like "body[p", "binary[p" or "binary[p" will be wrongly detected and the bufferposition can point outside of the allocated buffer for the rest of the parsing process. When the parser triggers the PARSE_PARTIAL macro after such a malformed argument was received this can lead to a similiar one byte memory corruption and allows remote code execution, when the heap layout was successfully controlled by the attacker.

Due to a bug within the argument parser of the partial command an argument like "body[p" will be wrongly detected as "body.peek". Because of this the bufferposition gets increased by 10 instead of 5 and could therefore point outside the allocated memory buffer for the rest of the parsing process. In imapd versions prior to 2.2.7 the handling of "body" or "bodypeek" arguments was broken so that the terminating ']' got overwritten by a '\0'. Combined the two problems allow a potential attacker to overwrite a single byte of malloc() control structures, which leads to remote code execution if the attacker successfully controls the heap layout.

When the option imapmagicplus is activated on a server the PROXY and LOGIN commands suffer a standard stack overflow, because the username is not checked against a maximum length when it is copied into a temporary stack buffer. This bug is especially dangerous because it can be triggered before any kind of authentification took place.

Multiple cross-site scripting vulnerabilities, caused by improper input parameter sanitizing, were detected in phpMyAdmin, which may enable an attacker to do cross-site scripting attacks.

An integer overflow condition in fetch(1) in the processing of HTTP headers can result in a buffer overflow.

A malicious server or CGI script can respond to an HTTP or HTTPS request in such a manner as to cause arbitrary portions of the client's memory to be overwritten, allowing for arbitrary code execution.

Caused by improper bounds checking of certain trans2 requests, there is a possible buffer overrun in smbd. The attacker needs to be able to create files with very specific Unicode filenames on the share to take advantage of this issue.

Hans Ulrich Niedermann reports:

The TWiki search function uses a user supplied search string to compose a command line executed by the Perl backtick (``) operator.

The search string is not checked properly for shell metacharacters and is thus vulnerable to search string containing quotes and shell commands.

IMPACT: An attacker is able to execute arbitrary shell commands with the privileges of the TWiki process.

A Gentoo Linux Security Advisory reports:

Florian Schilhabel of the Gentoo Linux Security Audit project found a format string vulnerability in Proxytunnel. When the program is started in daemon mode (-a [port]), it improperly logs invalid proxy answers to syslog.

A malicious remote server could send specially-crafted invalid answers to exploit the format string vulnerability, potentially allowing the execution of arbitrary code on the tunnelling host with the rights of the Proxytunnel process.

A Sudo Security Alerts reports:

A flaw in exists in sudo's environment sanitizing prior to sudo version 1.6.8p2 that could allow a malicious user with permission to run a shell script that utilized the bash shell to run arbitrary commands.

The Ruby CGI.rb module contains a bug which can cause the CGI module to go into an infinite loop, thereby causing a denial-of-service situation on the web server by using all available CPU time.

Karol Wiesek at iDEFENSE reports:

A remote attacker could cause an smbd process to consume abnormal amounts of system resources due to an input validation error when matching filenames containing wildcard characters.

Although samba.org classifies this as a DoS vulnerability, several members of the security community believe it may be exploitable for arbitrary code execution.

Gnats suffers from a format string bug, which may enable an attacker to execute arbitary code.

A SquirrelMail Security Notice reports:

There is a cross site scripting issue in the decoding of encoded text in certain headers. SquirrelMail correctly decodes the specially crafted header, but doesn't sanitize the decoded strings.

A siyahsapka.org advisory reads:

Hafiye-1.0 doesnt filter the payload when printing it to the terminal. A malicious attacker can send packets with escape sequence payloads to exploit this vulnerability.

If Hafiye has been started with -n packet count option , the vulnerability could allow remote code execution. For remote code execution the victim must press Enter after program exit.

Note that it appears that this bug can only be exploited in conjunction with a terminal emulator that honors the appropriate escape sequences.

Data supplied by a remote server is used as the format string instead of as parameters in a syslog() call. This may lead to crashes or potential running of arbitrary code. It is only a problem when running in daemon mode (very common) and when using some service types.

There exists a buffer overflow vulnerability in ImageMagick's EXIF parsing code which may lead to execution of arbitrary code.

It is possible for remote attackers to cause a denial-of-service scenario on Apache 2.0.52 and earlier by sending an HTTP GET request with a MIME header containing multiple lines full of whitespaces.

Socat Security Advisory 1 states:

socat up to version 1.4.0.2 contains a syslog() based format string vulnerability. This issue was originally reported by CoKi on 19 Oct.2004 http://www.nosystem.com.ar/advisories/advisory-07.txt. Further investigation showed that this vulnerability could under some circumstances lead to local or remote execution of arbitrary code with the privileges of the socat process.

infamous41md reports that libxml contains multiple buffer overflows in the URL parsing and DNS name resolving functions. These vulnerabilities could lead to execution of arbitrary code.

An AMaViS Security Announcement reports that a vulnerability exist in the Archive::Zip Perl module which may lead to bypass of malicious code in anti-virus programs by creating specially crafted ZIP files.

There is a buffer overflow in a function used by mod_include that may enable a local user to gain privileges of a httpd child. Only users that are able to create SSI documents can take advantage of that vulnerability.

The make_oidjoins_check script in the PostgreSQL RDBMS has insecure handling of temporary files, which could lead to an attacker overwriting arbitrary files with the credentials of the user running the make_oidjoins_check script.

infamous41md reports about the GD Graphics Library:

There is an integer overflow when allocating memory in the routine that handles loading PNG image files. This later leads to heap data structures being overwritten. If an attacker tricked a user into loading a malicious PNG image, they could leverage this into executing arbitrary code in the context of the user opening image.

There is a bug in SSH2 support that allows a server to execute malicious code on a connecting PuTTY client. This attack can be performed before host key verification happens, so a different machine -- man in the middle attack -- could fake the machine you are connecting to.

wzdftpd contains a potential remote Denial-of-Service.

There is a format string bug in rssh that enables an attacker to execute arbitrary code from an account configured to use rssh. On FreeBSD it is only possible to compromise the rssh running account, not root.

A Horde Team announcement states that a potential cross-site scripting vulnerability in the help window has been corrected. The vulnerability appears to involve the handling of the topic and module parameters of the help window template.

The bogofilter team has been provided with a test case of a malformatted (non-conformant) RFC-2047 encoded word that can cause bogofilter versions 0.92.7 and prior to try to write a NUL byte into a memory location that is either one byte past the end of a flex buffer or to a location that is the negative of the encoded word's start of payload data, causing a segmentation fault.

Chris Evans discovered several integer arithmetic overflows in the xpdf 2 and xpdf 3 code bases. The flaws have impacts ranging from denial-of-service to arbitrary code execution.

The Gaim team discovered denial-of-service vulnerabilities in the MSN protocol handler:

After accepting a file transfer request, Gaim will attempt to allocate a buffer of a size equal to the entire filesize, this allocation attempt will cause Gaim to crash if the size exceeds the amount of available memory.

Gaim allocates a buffer for the payload of each message received based on the size field in the header of the message. A malicious peer could specify an invalid size that exceeds the amount of available memory.

Sean infamous42md reports:

When a remote server provides a large "content-length" header value, Gaim will attempt to allocate a buffer to store the content, however this allocation attempt will cause Gaim to crash if the length exceeds the amount of possible memory. This happens when reading profile information on some protocols. It also happens when smiley themes are installed via drag and drop.

Sean infamous42md reports several situations in gaim that may result in exploitable buffer overflows:

• Rich Text Format (RTF) messages in Novell GroupWise protocol
• Unsafe use of gethostbyname in zephyr protocol
• URLs which are over 2048 bytes long once decoded

Sean infamous42md reports that a malicous GroupWise messaging server may be able to exploit a heap buffer overflow in gaim, leading to arbitrary code execution.

The Gaim Security Issues page documents a problem with installing smiley themes from an untrusted source:

To install a new smiley theme, a user can drag a tarball from a graphical file manager, or a hypertext link to one from a web browser. When a tarball is dragged, Gaim executes a shell command to untar it. However, it does not escape the filename before sending it to the shell. Thus, a specially crafted filename could execute arbitrary commands if the user could be convinced to drag a file into the smiley theme selector.

Due to a buffer overflow in the MSN protocol support for gaim 0.79 to 1.0.1, it is possible for remote clients to do a denial-of-service attack on the application. This is caused by an unbounded copy operation, which writes to the wrong buffer.

It is possible for clients to use any cipher suite configured by the virtual host, whether or not a certain cipher suite is selected for a specific directory. This might result in clients using a weaker encryption than originally configured.

Carlos Barros reports that mpg123 contains two buffer overflows. These vulnerabilities can potentially lead to execution of arbitrary code.

The first buffer overflow can occur when mpg123 parses a URL with a user-name/password field that is more than 256 characters long. This problem can be triggered either locally or remotely via a specially crafted play list. The second potential buffer overflow may be triggered locally by a specially crafted symlink to the mpg123 binary. This problem is not as serious, since mpg123 is not installed setuid by default.

The Apache HTTP Server 2.0.51 release notes report that the following issues have been fixed:

A segfault in mod_ssl which can be triggered by a malicious remote server, if proxying to SSL servers has been configured. [CAN-2004-0751]

A potential infinite loop in mod_ssl which could be triggered given particular timing of a connection abort. [CAN-2004-0748]

From the phpMyAdmin 2.6.0p2 release notes:

If PHP is not running in safe mode, a problem in the MIME-based transformation system (with an "external" transformation) allows to execute any command with the privileges of the web server's user.

cabextract has insufficient checks for file names that contain ../. This can cause files to be extracted to the parent directory.

Rudolf Polzer reports:

a2ps builds a command line for file() containing an unescaped version of the file name, thus might call external programs described by the file name. Running a cronjob over a public writable directory a2ps-ing all files in it - or simply typing "a2ps *.txt" in /tmp - is therefore dangerous.

Niels Heinen reports that ifmail allows one to specify a configuration file. Since ifmail runs set-user-ID `news', this may allow a local attacker to write to arbitrary files or execute arbitrary commands as the `news' user.

A Computer Academic Underground advisory describes the consequences of imwheel's handling of the process ID file (PID file):

imwheel exclusively uses a predictably named PID file for management of multiple imwheel processes. A race condition exists when the -k command-line option is used to kill existing imwheel processes. This race condition may be used by a local user to Denial of Service another user using imwheel, lead to resource exhaustion of the host system, or append data to arbitrary files.

A remote attacker is able to cause a denial-of-service situation, when NTLM authentication is enabled in squid. NTLM authentication uses two functions which lack correct offset checking.

Fernando Quintero reports that Cacti 0.8.5a suffers from a SQL injection attack where an attacker can change the password for any Cacti user. This attack is not possible if the PHP option magic_quotes_gpc is set to On, which is the default for PHP in FreeBSD.

A OpenPKG Security Advisory reports:

Triggered by a report to Packet Storm from Virulent, a format string vulnerability was found in mod_ssl, the Apache SSL/TLS interface to OpenSSL, version (up to and including) 2.8.18 for Apache 1.3. The mod_ssl in Apache 2.x is not affected. The vulnerability could be exploitable if Apache is used as a proxy for HTTPS URLs and the attacker established a own specially prepared DNS and origin server environment.

Tor has various remote crashes which could lead to a remote denial-of-service and be used to defeat clients anonymity. It is not expected that these vulnerabilities are exploitable for arbitrary code execution.

Caused by improper filtering of HTML code in the status display, it is possible for a remote user to execute scripting code in the target user's browser.

It is possible to execute remote code simply using HTTP request plus 31 headers followed by a shellcode that will be executed directly.

A remote attacker may be able to crash the freeRADIUS Server due to three independant bugs in the function which does improper checking values while processing RADIUS attributes.

Amit Klein reports about Xerces-C++:

An attacker can craft a malicious XML document, which uses XML attributes in a way that inflicts a denial of service condition on the target machine (XML parser). The result of this attack is that the XML parser consumes all the CPU.

Pages in the administration panel of Wordpress are vulnerable for XSS attacks.

Dmitry V. Levin discovered numerous integer overflow bugs in libtiff. Most of these bugs are related to memory management, and are believed to be exploitable for arbitrary code execution.

Certain methods of authenticated remote printing in CUPS can disclose user names and passwords in the log files.

A workaround for this problem is to set more strict access permissions on the CUPS logfiles.

The audio player Zinf is vulnerable to a buffer-overflow bug in the management of the playlist files.

Chris Evans discovered several heap buffer overflows in libtiff's RLE decoder. These overflows could be triggered by a specially-crafted TIFF image file, resulting in an application crash and possibly arbitrary code execution.

From Gentoo advisory GLSA 200410-01:

sharutils contains two buffer overflows. Ulf Harnhammar discovered a buffer overflow in shar.c, where the length of data returned by the wc command is not checked. Florian Schilhabel discovered another buffer overflow in unshar.c.

An attacker could exploit these vulnerabilities to execute arbitrary code as the user running one of the sharutils programs.

Caused by an untested return value, and a resulting null pointer dereference, it is possible for an attacker to crash the application. However, the attacker must first hijack the connection between Mail Notification and the Gmail or IMAP server.

The Squid-2.5 patches page notes:

If a certain malformed SNMP request is received squid restarts with a Segmentation Fault error.

This only affects squid installations where SNMP is explicitly enabled via "make config". As a workaround, SNMP can be disabled by defining "snmp_port 0" in squid.conf.

The Cyrus SASL DIGEST-MD5 plugin contains a potential buffer overflow when quoting is required in the output.

The Cyrus SASL library, libsasl, contains functions which may load dynamic libraries. These libraries may be loaded from the path specified by the environmental variable SASL_PATH, which in some situations may be fully controlled by a local attacker. Thus, if a set-user-ID application (such as chsh) utilizes libsasl, it may be possible for a local attacker to gain superuser privileges.

The script vulnerabilities can only be exposed with certain browsers and allow XSS attacks when viewing HTML messages with the HTML MIME viewer

Jon Nistor reported that the FreeBSD port of bmon was installed set-user-ID root, and executes commands using relative paths. This could allow local user to easily obtain root privileges.

Patric Hornik reports on a problem in the certificate chain verification procedures of GnuTLS that may result in a denial-of-service vulnerability:

The certificate chain should be verified from last root certificate to the first certificate. Otherwise a lot of unauthorized CPU processing can be forced to check certificate signatures signed with arbitrary RSA/DSA keys chosen by attacker.

In GnuTLS the signatures are checked from first to last certificate, there is no limit on size of keys and no limit on length of certificate chain.

Stefano Di Paola discovered an issue with PHP that could allow someone to upload a file to any directory writeable by the httpd process. Any sanitizing performed on the prepended directory path is ignored. This bug can only be triggered if the $_FILES element name contains an underscore.

Stefano Di Paola reports:

Bad array parsing in php_variables.c could lead to show arbitrary memory content such as pieces of php code and other data. This affects all GET, POST or COOKIES variables.

In a Bugtraq posting, infamous41md(at)hotpop.com reported:

there are at least 5 exploitable buffer and heap overflows in the image handling code. this allows someone to craft a malicious image, trick a user into viewing the file in xv, and upon viewing that image execute arbitrary code under privileges of the user viewing image. note the AT LEAST part of the above sentence. there is such a plethora of bad code that I just stopped reading after a while. there are at least 100 calls to sprintf() and strcpy() with no regards for bounds of buffers. 95% of these deal with program arguments or filenames, so they are of no interest to exploit. however I just got sick of reading this code after not too long. so im sure there are still other overflows in the image handling code for other image types.

The posting also included an exploit.

David Watson reports a symlink vulnerability in getmail. If run as root (not the recommended mode of operation), a local user may be able to cause getmail to write files in arbitrary directories via a symlink attack on subdirectories of the maildir.

The syscons CONS_SCRSHOT ioctl(2) does insufficient validation of its input arguments. In particular, negative coordinates or large coordinates may cause unexpected behavior.

It may be possible to cause the CONS_SCRSHOT ioctl to return portions of kernel memory. Such memory might contain sensitive information, such as portions of the file cache or terminal buffers. This information might be directly useful, or it might be leveraged to obtain elevated privileges in some way. For example, a terminal buffer might include a user-entered password.

This bug may be exploitable by users who have access to the physical console or can otherwise open a /dev/ttyv* device node.

Thomas Walpuski noted when OpenSSL would detect an error condition for a peer certificate, racoon mistakenly ignored the error. This could allow five invalid certificate states to properly be used for authentication.

Fix bug that might cause IP-based access control rules not to be interpreted correctly on 64-bit platforms.