A new security update has been released for Gentoo Linux - OptiPNG: User-assisted execution of arbitrary code. Here the announcement:
Gentoo Linux Security Advisory GLSA 200903-12
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http://security.gentoo.org/
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Severity: Normal
Title: OptiPNG: User-assisted execution of arbitrary code
Date: March 09, 2009
Bugs: #260265
ID: 200903-12
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Synopsis
========
A vulnerability in OptiPNG might result in user-assisted execution of
arbitrary code.
Background
==========
OptiPNG is a PNG optimizer that recompresses image files to a smaller
size, without losing any information.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 media-gfx/optipng < 0.6.2-r1 >= 0.6.2-r1
Description
===========
Roy Tam reported a use-after-free vulnerability in the
GIFReadNextExtension() function in lib/pngxtern/gif/gifread.c leading
to a memory corruption when reading a GIF image.
Impact
======
A remote attacker could entice a user to process a specially crafted
GIF image, possibly resulting in the execution of arbitrary code with
the privileges of the user running the application, or a Denial of
Service.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All OptiPNG users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-gfx/optipng-0.6.2-r1"
References
==========
[ 1 ] CVE-2009-0749
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0749
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200903-12.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2009 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
