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Gentoo Linux Security Advisory                           GLSA 200712-04
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Cairo: User-assisted execution of arbitrary code
      Date: December 09, 2007
      Bugs: #200350
        ID: 200712-04

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Synopsis
========

Multiple integer overflows were discovered in Cairo, possibly leading
to the execution of arbitrary code.

Background
==========

Cairo is a 2D vector graphics library with cross-device output support.

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

    -------------------------------------------------------------------
     Package         /  Vulnerable  /                       Unaffected
    -------------------------------------------------------------------
  1  x11-libs/cairo      < 1.4.12                            >= 1.4.12

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

Multiple integer overflows were reported, one of which Peter Valchev
(Google Security) found to be leading to a heap-based buffer overflow
in the cairo_image_surface_create_from_png() function that processes
PNG images.

Impact
======

A remote attacker could entice a user to view or process a specially
crafted PNG image file in an application linked against Cairo, possibly
leading to the execution of arbitrary code with the privileges of the
user running the application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Cairo users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-libs/cairo-1.4.12"

References
==========

  [ 1 ] CVE-2007-5503
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5503

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

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

  http://security.gentoo.org/glsa/glsa-200712-04.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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