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Gentoo Linux Security Advisory                           GLSA 200812-15
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                                              http://security.gentoo.org/
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    Severity: Normal
       Title: POV-Ray: User-assisted execution of arbitrary code
        Date: December 14, 2008
        Bugs: #153538
          ID: 200812-15

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Synopsis
========

POV-Ray includes a version of libpng that might allow for the execution
of arbitrary code when reading a specially crafted PNG file

Background
==========

POV-Ray is a well known open-source ray tracer.

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

      -------------------------------------------------------------------
       Package           /  Vulnerable  /                     Unaffected
      -------------------------------------------------------------------
    1  media-gfx/povray     < 3.6.1-r4                       >= 3.6.1-r4

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

POV-Ray uses a statically linked copy of libpng to view and output PNG
files. The version shipped with POV-Ray is vulnerable to CVE-2008-3964,
CVE-2008-1382, CVE-2006-3334, CVE-2006-0481, CVE-2004-0768. A bug in
POV-Ray's build system caused it to load the old version when your
installed copy of libpng was >=media-libs/libpng-1.2.10.

Impact
======

An attacker could entice a user to load a specially crafted PNG file as
a texture, resulting in the execution of arbitrary code with the
permissions of the user running the application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All POV-Ray users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=media-gfx/povray-3.6.1-r4"

References
==========

    [ 1 ] CVE-2004-0768
          http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0768
    [ 2 ] CVE-2006-0481
          http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0481
    [ 3 ] CVE-2006-3334
          http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3334
    [ 4 ] CVE-2008-1382
          http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1382
    [ 5 ] CVE-2008-3964
          http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3964

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

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

    http://security.gentoo.org/glsa/glsa-200812-15.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 2008 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