diff options
Diffstat (limited to 'usr.sbin/bsdinstall/scripts/hardening')
| -rwxr-xr-x | usr.sbin/bsdinstall/scripts/hardening | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/usr.sbin/bsdinstall/scripts/hardening b/usr.sbin/bsdinstall/scripts/hardening new file mode 100755 index 000000000000..a77fcdeaf540 --- /dev/null +++ b/usr.sbin/bsdinstall/scripts/hardening @@ -0,0 +1,93 @@ +#!/bin/sh +#- +# Copyright (c) 2016 Bartek Rutkowski +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution. +# +# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +# SUCH DAMAGE. +# + +BSDCFG_SHARE="/usr/share/bsdconfig" +. $BSDCFG_SHARE/common.subr || exit 1 + +: ${BSDDIALOG_OK=0} + +echo -n > $BSDINSTALL_TMPETC/rc.conf.hardening +echo -n > $BSDINSTALL_TMPETC/sysctl.conf.hardening +echo -n > $BSDINSTALL_TMPBOOT/loader.conf.hardening + +exec 5>&1 +FEATURES=$( bsddialog --backtitle "$OSNAME Installer" \ + --title "System Hardening" --nocancel --separate-output \ + --checklist "Choose system security hardening options:" \ + 0 0 0 \ + "0 hide_uids" "Hide processes running as other users" ${hide_uids:-off} \ + "1 hide_gids" "Hide processes running as other groups" ${hide_gids:-off} \ + "2 hide_jail" "Hide processes running in jails" ${hide_jail:-off} \ + "3 read_msgbuf" "Disable reading kernel message buffer for unprivileged users" ${read_msgbuf:-off} \ + "4 proc_debug" "Disable process debugging facilities for unprivileged users" ${proc_debug:-off} \ + "5 random_pid" "Randomize the PID of newly created processes" ${random_pid:-off} \ + "6 clear_tmp" "Clean the /tmp filesystem on system startup" ${clear_tmp:-off} \ + "7 disable_syslogd" "Disable opening Syslogd network socket (disables remote logging)" ${disable_syslogd:-off} \ + "8 secure_console" "Enable console password prompt" ${secure_console:-off} \ + "9 disable_ddtrace" "Disallow DTrace destructive-mode" ${disable_ddtrace:-off} \ +2>&1 1>&5 ) +retval=$? +exec 5>&- + +if [ $retval -ne $BSDDIALOG_OK ]; then + exit 1 +fi + +for feature in $FEATURES; do + case "$feature" in + hide_uids) + echo security.bsd.see_other_uids=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening + ;; + hide_gids) + echo security.bsd.see_other_gids=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening + ;; + hide_jail) + echo security.bsd.see_jail_proc=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening + ;; + read_msgbuf) + echo security.bsd.unprivileged_read_msgbuf=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening + ;; + proc_debug) + echo security.bsd.unprivileged_proc_debug=0 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening + ;; + random_pid) + echo kern.randompid=1 >> $BSDINSTALL_TMPETC/sysctl.conf.hardening + ;; + clear_tmp) + echo 'clear_tmp_enable="YES"' >> $BSDINSTALL_TMPETC/rc.conf.hardening + ;; + disable_syslogd) + echo 'syslogd_flags="-ss"' >> $BSDINSTALL_TMPETC/rc.conf.hardening + ;; + secure_console) + sed "s/unknown off secure/unknown off insecure/g" $BSDINSTALL_CHROOT/etc/ttys > $BSDINSTALL_TMPETC/ttys.hardening + ;; + disable_ddtrace) + echo 'security.bsd.allow_destructive_dtrace=0' >> $BSDINSTALL_TMPBOOT/loader.conf.hardening + ;; + esac +done |