The cairo-dwrite implementation in Mozilla Firefox 4.x through 11.0, Firefox ESR 10.x before 10.0.4, Thunderbird 5.0 through 11.0, Thunderbird ESR 10.x before 10.0.4, and SeaMonkey before 2.9, when certain Windows Vista and Windows 7 configurations are used, does not properly restrict font-rendering attempts, which allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via unspecified vectors.
secunia.com/advisories/48972
secunia.com/advisories/49055
www.mandriva.com/security/advisories?name=MDVSA-2012:066
www.mandriva.com/security/advisories?name=MDVSA-2012:081
www.mozilla.org/security/announce/2012/mfsa2012-25.html
www.securityfocus.com/bid/53218
bugzilla.mozilla.org/show_bug.cgi?id=744480
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17067