The navigator.plugins implementation in Mozilla Firefox before 3.5.12 and 3.6.x before 3.6.9, Thunderbird before 3.0.7 and 3.1.x before 3.1.3, and SeaMonkey before 2.0.7 does not properly handle destruction of the DOM plugin array, which might allow remote attackers to cause a denial of service (application crash) or execute arbitrary code via crafted access to the navigator object, related to a "dangling pointer vulnerability."
http://blogs.sun.com/security/entry/multiple_vulnerabilities_in_mozilla_firefox
http://lists.fedoraproject.org/pipermail/package-announce/2010-September/047282.html
http://lists.opensuse.org/opensuse-security-announce/2010-10/msg00002.html
https://bugzilla.mozilla.org/show_bug.cgi?id=584512
http://secunia.com/advisories/42867
https://exchange.xforce.ibmcloud.com/vulnerabilities/61658
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11969
http://support.avaya.com/css/P8/documents/100110210
http://support.avaya.com/css/P8/documents/100112690
http://www.debian.org/security/2010/dsa-2106
http://www.mandriva.com/security/advisories?name=MDVSA-2010:173
http://www.mozilla.org/security/announce/2010/mfsa2010-51.html