The ClusterIterator::NextCluster function in Mozilla Firefox before 19.0, Thunderbird before 17.0.3, and SeaMonkey before 2.16 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via unspecified vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16619
https://bugzilla.mozilla.org/show_bug.cgi?id=798867
http://www.ubuntu.com/usn/USN-1748-1
http://www.ubuntu.com/usn/USN-1729-2
http://www.ubuntu.com/usn/USN-1729-1
http://www.mozilla.org/security/announce/2013/mfsa2013-28.html
http://lists.opensuse.org/opensuse-updates/2013-02/msg00062.html
http://lists.opensuse.org/opensuse-security-announce/2013-02/msg00017.html