=====================================================================
                                  CERT-Renater

                       Note d'Information No. 2005/VULN687
_____________________________________________________________________

DATE                      : 04/11/2005

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running giflib.

======================================================================

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200511-03
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                             http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

   Severity: Normal
      Title: giflib: Multiple vulnerabilities
       Date: November 04, 2005
       Bugs: #109997
         ID: 200511-03

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

giflib may dereference NULL or write out of bounds when processing
malformed images, potentially resulting in Denial of Service or
arbitrary code execution.

Background
==========

giflib is a library for reading and writing GIF images.

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

     -------------------------------------------------------------------
      Package            /  Vulnerable  /                    Unaffected
     -------------------------------------------------------------------
   1  media-libs/giflib       < 4.1.4                          >= 4.1.4

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

Chris Evans and Daniel Eisenbud independently discovered two
out-of-bounds memory write operations and a NULL pointer dereference in
giflib.

Impact
======

An attacker could craft a malicious GIF image and entice users to load
it using an application making use of the giflib library, resulting in
an application crash or potentially the execution of arbitrary code.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All giflib users should upgrade to the latest version:

     # emerge --sync
     # emerge --ask --oneshot --verbose ">=media-libs/giflib-4.1.4"

References
==========

   [ 1 ] CVE-2005-2974
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2974
   [ 2 ] CVE-2005-3350
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3350

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

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

   http://security.gentoo.org/glsa/glsa-200511-03.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 at gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2005 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

======================================================================

         =========================================================
         Les serveurs de référence du CERT-Renater
         http://www.urec.fr/securite
         http://www.cru.fr/securite
         http://www.renater.fr
         =========================================================
         + CERT-RENATER          | tel : 01-53-94-20-44          +
         + 151 bd de l'Hopital   | fax : 01-53-94-20-41          +
         + 75013 Paris           | email: certsvp@renater.fr     +
         =========================================================