[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <20090622001424.GG12343@outflux.net>
Date: Sun, 21 Jun 2009 17:14:24 -0700
From: Kees Cook <kees@...ntu.com>
To: oss-security@...ts.openwall.com
Subject: libtiff buffer underflow in LZWDecodeCompat
A crafted TIFF can crash libtiff in LZWDecodeCompat via underflow (different
from CVE-2008-2327).
Based on discussions[1] and a quick analysis[2], I don't think this is
exploitable, but it does lead to crashes in any application using libtiff.
I've reported it upstream[3], with the attached patch.
Has anyone else looked this over?
-Kees
[1] http://www.lan.st/showthread.php?t=1856&page=3
[2] https://bugs.launchpad.net/bugs/380149
[3] http://bugzilla.maptools.org/show_bug.cgi?id=2065
--
Kees Cook
Ubuntu Security Team
View attachment "lzw_underflow.patch" of type "text/x-diff" (681 bytes)
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
