firefox is vulnerable to arbitrary code execution. Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause Firefox to crash or, potentially, execute arbitrary code with the privileges of the user running Firefox.
downloads.avaya.com/css/P8/documents/100133195
www.mandriva.com/security/advisories?name=MDVSA-2011:041
www.mozilla.org/security/announce/2011/mfsa2011-07.html
www.mozilla.org/security/known-vulnerabilities/firefox36.html#firefox3.6.14
www.securityfocus.com/bid/46660
access.redhat.com/errata/RHSA-2011:0310
access.redhat.com/security/updates/classification/#critical
bugzilla.mozilla.org/show_bug.cgi?id=607160
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14254