[ GLSA 200601-08 ] Blender: Heap-based buffer overflow

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

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Gentoo Linux Security Advisory                           GLSA 200601-08
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Blender: Heap-based buffer overflow
      Date: January 13, 2006
      Bugs: #118163
        ID: 200601-08

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Synopsis
========

Blender is vulnerable to a buffer overflow that may be exploited by
attackers to execute arbitrary code.

Background
==========

Blender is an open source software for 3D modeling, animation,
rendering, post-production, interactive creation and playback.

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  media-gfx/blender       < 2.40                            >= 2.40

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

Damian Put has reported a flaw due to an integer overflow in the
"get_bhead()" function, leading to a heap overflow when processing
malformed ".blend" files.

Impact
======

A remote attacker could entice a user into opening a specially crafted
".blend" file, resulting in the execution of arbitrary code with the
permissions of the user running Blender.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Blender users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-gfx/blender-2.40"

References
==========

  [ 1 ] CVE-2005-4470
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-4470

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

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

  http://security.gentoo.org/glsa/glsa-200601-08.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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