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[ GLSA 201101-03 ] libvpx: User-assisted execution of arbitrary code
From: Tim Sammut <underling () gentoo org>
Date: Fri, 14 Jan 2011 18:21:54 -0800

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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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