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Gentoo Linux Security Advisory                           GLSA 201612-37
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Pixman: Buffer overflow
     Date: December 13, 2016
     Bugs: #561526
       ID: 201612-37

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Synopsis
=======
A buffer overflow in Pixman might allow remote attackers to execute
arbitrary code.

Background
=========
Pixman is a pixel manipulation library.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  x11-libs/pixman              < 0.32.8                  >= 0.32.8 

Description
==========
In pixman-general, careless computations done with the 'dest_buffer'
pointer may overflow, failing the buffer upper limit check.

Impact
=====
A remote attacker could possibly cause a Denial of Service condition,
or execute arbitrary code with the privileges of the process.

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-0.32.8"

References
=========
[ 1 ] Pixman 0.32.8 Release Notes
      https://lists.x.org/archives/xorg-announce/2015-September/002637.html

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

 https://security.gentoo.org/glsa/201612-37

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 2016 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.

https://creativecommons.org/licenses/by-sa/2.5/