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Gentoo Linux Security Advisory                           GLSA 201404-03
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                                            https://security.gentoo.org/
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 Severity: Normal
    Title: OptiPNG: User-assisted execution of arbitrary code
     Date: April 07, 2014
     Bugs: #435340
       ID: 201404-03

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Synopsis
=======
A use-after-free error in OptiPNG could result in execution of
arbitrary code or Denial of Service.

Background
=========
OptiPNG is a PNG optimizer that recompresses image files to a smaller
size, without losing any information.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  media-gfx/optipng            < 0.7.3                    >= 0.7.3 

Description
==========
A use-after-free vulnerability exists in the palette reduction
functionality of OptiPNG.

Impact
=====
A remote attacker could entice a user to open a specially crafted image
file, 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 OptiPNG users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=media-gfx/optipng-0.7.3"

References
=========
[ 1 ] CVE-2012-4432
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-4432

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

 https://security.gentoo.org/glsa/201404-03

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.

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

-- 
Mikle Kolyada
Gentoo Linux Developer