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In long form encoding, explicitly prohibit an initial length octet of 0xff

which is reserved for future use.
ok claudio@
OPENBSD_6_6
rob 5 years ago
parent
commit
b3f85186e0
1 changed files with 7 additions and 1 deletions
  1. +7
    -1
      src/lib/libutil/ber.c

+ 7
- 1
src/lib/libutil/ber.c View File

@ -1,4 +1,4 @@
/* $OpenBSD: ber.c,v 1.1 2019/05/11 17:46:02 rob Exp $ */
/* $OpenBSD: ber.c,v 1.2 2019/05/12 17:42:14 rob Exp $ */
/*
* Copyright (c) 2007, 2012 Reyk Floeter <reyk@openbsd.org>
@ -1151,6 +1151,12 @@ get_len(struct ber *b, ssize_t *len)
return -1;
}
if (u == 0xff) {
/* Reserved for future use. */
errno = EINVAL;
return -1;
}
n = u & ~BER_TAG_MORE;
if (sizeof(ssize_t) < n) {
errno = ERANGE;


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