The XPCSafeJSObjectWrapper class in the SafeJSObjectWrapper (aka SJOW) implementation in Mozilla Firefox 3.6.x before 3.6.9 and Thunderbird 3.1.x before 3.1.3 does not properly restrict objects at the end of scope chains, which allows remote attackers to execute arbitrary JavaScript code with chrome privileges via vectors related to a chrome privileged object and a chain ending in an outer object.
http://blogs.sun.com/security/entry/multiple_vulnerabilities_in_mozilla_firefox
http://lists.opensuse.org/opensuse-security-announce/2010-10/msg00002.html
https://bugzilla.mozilla.org/show_bug.cgi?id=584180
http://secunia.com/advisories/42867
https://exchange.xforce.ibmcloud.com/vulnerabilities/61656
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11492
http://support.avaya.com/css/P8/documents/100112690
http://www.mandriva.com/security/advisories?name=MDVSA-2010:173
http://www.mozilla.org/security/announce/2010/mfsa2010-59.html