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[gentoo-announce] [ GLSA 201101-03 ] libvpx: User-assisted execution of arbitrary code

Posted on 14 January 2011
Gentoo-announce

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Gentoo Linux Security Advisory GLSA 201101-03
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http://security.gentoo.org/
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Severity: Normal
Title: libvpx: User-assisted execution of arbitrary code
Date: January 15, 2011
Bugs: #345559
ID: 201101-03

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Synopsis
========
Timothy B. Terriberry discovered that libvpx contains an integer
overflow vulnerability in the processing of video streams that may
allow user-assisted execution of arbitrary code.

Background
==========
libvpx is the VP8 codec SDK used to encode and decode video streams,
typically within a WebM format media file.

Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 media-libs/libvpx < 0.9.5 >= 0.9.5

Description
===========
libvpx is vulnerable to an integer overflow vulnerability when
processing crafted VP8 video streams.

Impact
======
A remote attacker could entice a user to open a specially crafted media
file, 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 libvpx users should upgrade to the latest stable version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/libvpx-0.9.5"

Packages which depend on this library may need to be recompiled. Tools
such as revdep-rebuild may assist in identifying some of these
packages.

References
==========
[ 1 ] CVE-2010-4203
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4203

Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-201101-03.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
https://bugs.gentoo.org.

License
=======
Copyright 2011 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


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