Mozilla Firefox 3 before 3.0.1 on Mac OS X allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted GIF file that triggers a free of an uninitialized pointer.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2008-2927
https://bugzilla.mozilla.org/show_bug.cgi?id=441360
http://www.vupen.com/english/advisories/2009/0977
http://www.vupen.com/english/advisories/2008/2125
http://www.securityfocus.com/bid/30266
http://www.mozilla.org/security/announce/2008/mfsa2008-36.html
http://sunsolve.sun.com/search/document.do?assetkey=1-26-256408-1
http://securitytracker.com/id?1020516
http://secunia.com/advisories/34501