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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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