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Gentoo Linux Security Advisory                           GLSA 201402-03
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: Pixman: User-assisted execution of arbitrary code
     Date: February 02, 2014
     Bugs: #493292
       ID: 201402-03

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Synopsis
========

An integer underflow vulnerability in Pixman may allow a
context-dependent attacker to cause Denial of Service.

Background
==========

Pixman is a pixel manipulation library.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  x11-libs/pixman              < 0.32.4                  >= 0.32.4 

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

The trapezoid handling code in Pixman contains an integer underflow
vulnerability.

Impact
======

A context-dependent attacker could entice a user to open a specially
crafted file using an application linked against Pixman, possibly
resulting in  execution of arbitrary code with the privileges of the
process, or a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Pixman users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=x11-libs/pixman-0.32.4"

Packages which depend on this library may need to be recompiled. Tools
such as revdep-rebuild may assist in identifying these packages.

References
==========

[ 1 ] CVE-2013-6425
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-6425

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

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

 http://security.gentoo.org/glsa/glsa-201402-03.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
https://bugs.gentoo.org.

License
=======

Copyright 2014 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