The nsWindow implementation in the browser engine in Mozilla Firefox before 3.6.28 and 4.x through 10.0, Firefox ESR 10.x before 10.0.3, Thunderbird before 3.1.20 and 5.0 through 10.0, Thunderbird ESR 10.x before 10.0.3, and SeaMonkey before 2.8 does not check the validity of an instance after event dispatching, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors, as demonstrated by Mobile Firefox on Android.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15143
https://bugzilla.mozilla.org/show_bug.cgi?id=688208
http://www.securitytracker.com/id?1026804
http://www.securitytracker.com/id?1026803
http://www.securitytracker.com/id?1026801
http://www.securityfocus.com/bid/52466
http://www.mozilla.org/security/announce/2012/mfsa2012-19.html
http://secunia.com/advisories/48629
http://secunia.com/advisories/48624
http://secunia.com/advisories/48561
http://secunia.com/advisories/48553
http://secunia.com/advisories/48402
http://lists.opensuse.org/opensuse-updates/2012-03/msg00042.html
http://lists.opensuse.org/opensuse-security-announce/2012-03/msg00015.html
http://lists.opensuse.org/opensuse-security-announce/2012-03/msg00014.html