[ GLSA 200603-18 ] Pngcrush: Buffer overflow

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200603-18
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Pngcrush: Buffer overflow
      Date: March 21, 2006
      Bugs: #123286
        ID: 200603-18

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Synopsis
========

Pngcrush is vulnerable to a buffer overflow which could potentially
lead to the execution of arbitrary code.

Background
==========

Pngcrush is an optimizer for PNG files.

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

    -------------------------------------------------------------------
     Package             /  Vulnerable  /                   Unaffected
    -------------------------------------------------------------------
  1  media-gfx/pngcrush       < 1.6.2                         >= 1.6.2

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

Carsten Lohrke of Gentoo Linux reported that Pngcrush contains a
vulnerable version of zlib (GLSA 200507-19).

Impact
======

By creating a specially crafted data stream, attackers can overwrite
data structures for applications that use Pngcrush, resulting in a
Denial of Service and potentially arbitrary code execution.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Pngcrush users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-gfx/pngcrush-1.6.2"

References
==========

  [ 1 ] GLSA 200507-19
        http://www.gentoo.org/security/en/glsa/glsa-200507-19.xml
  [ 2 ] CVE-2005-1849
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-1849

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

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

  http://security.gentoo.org/glsa/glsa-200603-18.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 2006 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/2.0

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