diff options
Diffstat (limited to 'crypto/objects/obj_dat.c')
| -rw-r--r-- | crypto/objects/obj_dat.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/crypto/objects/obj_dat.c b/crypto/objects/obj_dat.c index 01cde00e98b7..1a52000e6e9d 100644 --- a/crypto/objects/obj_dat.c +++ b/crypto/objects/obj_dat.c @@ -1,5 +1,5 @@ /* - * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved. + * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the Apache License 2.0 (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy @@ -443,6 +443,25 @@ int OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *a, int no_name) first = 1; bl = NULL; + /* + * RFC 2578 (STD 58) says this about OBJECT IDENTIFIERs: + * + * > 3.5. OBJECT IDENTIFIER values + * > + * > An OBJECT IDENTIFIER value is an ordered list of non-negative + * > numbers. For the SMIv2, each number in the list is referred to as a + * > sub-identifier, there are at most 128 sub-identifiers in a value, + * > and each sub-identifier has a maximum value of 2^32-1 (4294967295 + * > decimal). + * + * So a legitimate OID according to this RFC is at most (32 * 128 / 7), + * i.e. 586 bytes long. + * + * Ref: https://datatracker.ietf.org/doc/html/rfc2578#section-3.5 + */ + if (len > 586) + goto err; + while (len > 0) { l = 0; use_bn = 0; |