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[ GLSA 200602-01 ] GStreamer FFmpeg plugin: Heap-based buffer overflow
From: Stefan Cornelius <dercorny () gentoo org>
Date: Sun, 5 Feb 2006 19:17:51 +0100

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Gentoo Linux Security Advisory                           GLSA 200602-01
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: GStreamer FFmpeg plugin: Heap-based buffer overflow
      Date: February 05, 2006
      Bugs: #119512
        ID: 200602-01

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Synopsis
========

The GStreamer FFmpeg plugin is vulnerable to a buffer overflow that may
be exploited by attackers to execute arbitrary code.

Background
==========

The GStreamer FFmpeg plugin uses code from the FFmpeg library to
provide fast colorspace conversion and multimedia decoders to the
GStreamer open source media framework.

Affected packages
=================

    -------------------------------------------------------------------
     Package                           /  Vulnerable  /     Unaffected
    -------------------------------------------------------------------
  1  media-plugins/gst-plugins-ffmpeg     < 0.8.7-r1       >= 0.8.7-r1

Description
===========

The GStreamer FFmpeg plugin contains derived code from the FFmpeg
library, which is vulnerable to a heap overflow in the
"avcodec_default_get_buffer()" function discovered by Simon Kilvington
(see GLSA 200601-06).

Impact
======

A remote attacker could entice a user to run an application using the
GStreamer FFmpeg plugin on a maliciously crafted PIX_FMT_PAL8 format
image file (like PNG images), possibly leading to the execution of
arbitrary code with the permissions of the user running the
application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All GStreamer FFmpeg plugin users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-plugins/gst-plugins-ffmpeg-0.8.7-r1"

References
==========

  [ 1 ] CVE-2005-4048
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-4048
  [ 2 ] GLSA 200601-06
        http://www.gentoo.org/security/en/glsa/glsa-200601-06.xml

Availability
============

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

  http://security.gentoo.org/glsa/glsa-200602-01.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 2006 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/2.0

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