firefox is vulnerable to arbitrary code execution. The vulnerability exists through a heap memory corruption issue.
lists.opensuse.org/opensuse-security-announce/2013-05/msg00010.html
lists.opensuse.org/opensuse-security-announce/2013-05/msg00011.html
lists.opensuse.org/opensuse-security-announce/2013-05/msg00012.html
lists.opensuse.org/opensuse-security-announce/2013-06/msg00006.html
lists.opensuse.org/opensuse-security-announce/2013-06/msg00008.html
rhn.redhat.com/errata/RHSA-2013-0820.html
rhn.redhat.com/errata/RHSA-2013-0821.html
www.debian.org/security/2013/dsa-2699
www.mandriva.com/security/advisories?name=MDVSA-2013:165
www.mozilla.org/security/announce/2013/mfsa2013-48.html
www.mozilla.org/security/known-vulnerabilities/firefoxESR.html
www.securityfocus.com/bid/59862
www.ubuntu.com/usn/USN-1822-1
www.ubuntu.com/usn/USN-1823-1
access.redhat.com/security/updates/classification/#critical
bugzilla.mozilla.org/show_bug.cgi?id=851781
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16988
rhn.redhat.com/errata/RHSA-2013-0820.html