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add an extra sanity check for stepping through TCP header options

This commit is contained in:
darrenr 2004-12-16 16:37:52 +00:00
parent 9508efa066
commit d7859a0415
1 changed files with 2 additions and 2 deletions
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4
sys/dist/ipf/netinet/ip_nat.c vendored
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@ -1,4 +1,4 @@
/* $NetBSD: ip_nat.c,v 1.1 2004/10/01 15:26:00 christos Exp $ */
/* $NetBSD: ip_nat.c,v 1.2 2004/12/16 16:37:52 darrenr Exp $ */
/*
* Copyright (C) 1995-2003 by Darren Reed.
@ -4631,7 +4631,7 @@ u_short *csump;
if (cp + 1 >= ep)
break;
advance = cp[1];
if (cp + advance > ep)
if ((cp + advance > ep) || (advance <= 0))
break;
switch (opt)
{