firefox/thunderbird/seamonkey is vulnerable to arbitrary code execution. Several use-after-free and dangling pointer flaws were found in Firefox. A web page containing malicious content could cause Firefox to crash or, potentially, execute arbitrary code with the privileges of the user running Firefox.
blogs.sun.com/security/entry/multiple_vulnerabilities_in_mozilla_firefox
lists.fedoraproject.org/pipermail/package-announce/2010-September/047282.html
lists.opensuse.org/opensuse-security-announce/2010-10/msg00002.html
secunia.com/advisories/42867
support.avaya.com/css/P8/documents/100112690
www.debian.org/security/2010/dsa-2106
www.mandriva.com/security/advisories?name=MDVSA-2010:173
www.mozilla.org/security/announce/2010/mfsa2010-57.html
www.mozilla.org/security/known-vulnerabilities/firefox36.html#firefox3.6.9
www.redhat.com/security/updates/classification/#critical
www.securityfocus.com/bid/43100
www.vupen.com/english/advisories/2010/2323
www.vupen.com/english/advisories/2011/0061
www.zerodayinitiative.com/advisories/ZDI-10-176/
access.redhat.com/errata/RHSA-2010:0681
bugzilla.mozilla.org/show_bug.cgi?id=580445
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11778