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Gentoo Linux Security Advisory                           GLSA 200712-24
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: AMD64 x86 emulation GTK+ library: User-assisted execution of
            arbitrary code
      Date: December 30, 2007
      Bugs: #201860
        ID: 200712-24

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Synopsis
========

Multiple integer overflow vulnerabilities in the AMD64 x86 emulation
GTK+ libraries may result in the execution of arbitrary code in
applications using Cairo.

Background
==========

Cairo is a 2D vector graphics library with cross-device output support.
The AMD64 x86 emulation GTK+ library packages Cairo libraries for 32bit
x86 emulation on AMD64.

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

    -------------------------------------------------------------------
     Package                 /  Vulnerable  /               Unaffected
    -------------------------------------------------------------------
  1  emul-linux-x86-gtklibs     < 20071214                 >= 20071214
    -------------------------------------------------------------------
     # Package 1 only applies to AMD64 users.

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

The Cairo versions used by the AMD64 x86 emulation GTK+ libraries were
vulnerable to integer overflow vulnerabilities (GLSA 200712-04).

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 AMD64 x86 emulation GTK+ library users should upgrade to the latest
version:

    # emerge --sync
    # emerge -a -1 -v
 ">=app-emulation/emul-linux-x86-gtklibs-20071214"

References
==========

  [ 1 ] GLSA 200712-04
        http://www.gentoo.org/security/en/glsa/glsa-200712-04.xml

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

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

  http://security.gentoo.org/glsa/glsa-200712-24.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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