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Gentoo Linux Security Advisory                           GLSA 200708-02
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http://security.gentoo.org/ 
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  Severity: Normal
     Title: Xvid: Array indexing vulnerabilities
      Date: August 08, 2007
      Bugs: #183145
        ID: 200708-02

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Synopsis
=======
Several array indexing vulnerabilities were discovered in Xvid,
possibly allowing for the remote execution of arbitrary code.

Background
=========
Xvid is a popular open source video codec licensed under the GPL.

Affected packages
================
    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  media-libs/xvid       < 1.1.3                            >= 1.1.3

Description
==========
Trixter Jack discovered an array indexing error in the
get_intra_block() function in the file src/bitstream/mbcoding.c. The
get_inter_block_h263() and get_inter_block_mpeg() functions in the same
file were also reported as vulnerable.

Impact
=====
An attacker could exploit these vulnerabilities to execute arbitrary
code by tricking a user or automated system into processing a malicious
video file with an application that makes use of the Xvid library.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All Xvid users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/xvid-1.1.3"

References
=========
  [ 1 ] CVE-2007-3329
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3329 

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

http://security.gentoo.org/glsa/glsa-200708-02.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 2007 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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