The _cairo_xlib_surface_add_glyph function in Mozilla Firefox before 21.0, Firefox ESR 17.x before 17.0.6, Thunderbird before 17.0.6, and Thunderbird ESR 17.x before 17.0.6 allows remote attackers to execute arbitrary code or cause a denial of service (invalid write operation) via unspecified vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16577
https://bugzilla.mozilla.org/show_bug.cgi?id=839745
http://www.ubuntu.com/usn/USN-1823-1
http://www.ubuntu.com/usn/USN-1822-1
http://www.securityfocus.com/bid/59864
http://www.mozilla.org/security/announce/2013/mfsa2013-48.html
http://www.mandriva.com/security/advisories?name=MDVSA-2013:165
http://www.debian.org/security/2013/dsa-2699
http://rhn.redhat.com/errata/RHSA-2013-0821.html
http://rhn.redhat.com/errata/RHSA-2013-0820.html
http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00008.html
http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00006.html
http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00012.html
http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00010.html