Heap-based buffer overflow in the gfxTextRun::ShrinkToLigatureBoundaries function in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.1, Thunderbird before 17.0.2, Thunderbird ESR 17.x before 17.0.1, and SeaMonkey before 2.15 allows remote attackers to execute arbitrary code via a crafted document.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17019
https://bugzilla.mozilla.org/show_bug.cgi?id=785555
http://www.ubuntu.com/usn/USN-1681-4
http://www.ubuntu.com/usn/USN-1681-2
http://www.ubuntu.com/usn/USN-1681-1
http://www.mozilla.org/security/announce/2013/mfsa2013-02.html
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00017.html
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00006.html