[ GLSA 200511-14 ] GTK+ 2, GdkPixbuf: Multiple XPM decoding vulnerabilities

[Thierry Carrez <koon () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200511-14
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: GTK+ 2, GdkPixbuf: Multiple XPM decoding vulnerabilities
      Date: November 16, 2005
      Bugs: #112608
        ID: 200511-14

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Synopsis
========

The GdkPixbuf library, that is also included in GTK+ 2, contains
vulnerabilities that could lead to a Denial of Service or the
execution of arbitrary code.

Background
==========

GTK+ (the GIMP Toolkit) is a toolkit for creating graphical user
interfaces. The GdkPixbuf library provides facilities for image
handling. It is available as a standalone library and also packaged
with GTK+ 2.

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

    -------------------------------------------------------------------
     Package                /   Vulnerable   /              Unaffected
    -------------------------------------------------------------------
  1  x11-libs/gtk+              < 2.8.6-r1                 >= 2.8.6-r1
                                                         *>= 2.6.10-r1
                                                                 < 2.0
  2  media-libs/gdk-pixbuf      < 0.22.0-r5               >= 0.22.0-r5
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

iDEFENSE reported a possible heap overflow in the XPM loader
(CVE-2005-3186). Upon further inspection, Ludwig Nussel discovered two
additional issues in the XPM processing functions : an integer overflow
(CVE-2005-2976) that affects only gdk-pixbuf, and an infinite loop
(CVE-2005-2975).

Impact
======

Using a specially crafted XPM image an attacker could cause an affected
application to enter an infinite loop or trigger the overflows,
potentially allowing the execution of arbitrary code.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All GTK+ 2 users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose x11-libs/gtk+

All GdkPixbuf users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/gdk-pixbuf-0.22.0-r5"

References
==========

  [ 1 ] CVE-2005-2975
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2975
  [ 2 ] CVE-2005-2976
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2976
  [ 3 ] CVE-2005-3186
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3186
  [ 4 ] iDefense Security Advisory 11.15.05

http://www.idefense.com/application/poi/display?id=339&type=vulnerabilities

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

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

  http://security.gentoo.org/glsa/glsa-200511-14.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 2005 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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