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PR/44059 CVS commit: [netbsd-7] src/sys/dist/pf/net
The following reply was made to PR kern/44059; it has been noted by GNATS.
From: "Soren Jacobsen" <snj%netbsd.org@localhost>
Subject: PR/44059 CVS commit: [netbsd-7] src/sys/dist/pf/net
Date: Sat, 10 Feb 2018 04:21:19 +0000
Module Name: src
Committed By: snj
Date: Sat Feb 10 04:21:19 UTC 2018
src/sys/dist/pf/net [netbsd-7]: pf.c
Pull up following revision(s) (requested by maxv in ticket #1565):
sys/dist/pf/net/pf.c: revision 1.78 via patch
Oh, what is this. Fix a remotely-triggerable integer overflow: the way we
define TCPOLEN_SACK makes it unsigned, and the comparison in the while()
is unsigned too. That's not the expected behavior, the original code
wanted a signed comparison.
It's pretty easy to make 'hlen' go negative and trigger a buffer overflow.
This bug was reported 8 years ago by Lucio Albornoz in PR/44059.
To generate a diff of this commit:
cvs rdiff -u -r1.72 -r18.104.22.168 src/sys/dist/pf/net/pf.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
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