Mozilla Firefox before 15.0 does not properly restrict navigation to the about:newtab page, which allows remote attackers to execute arbitrary JavaScript code with chrome privileges via a crafted web site that triggers creation of a new tab and then a new window.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16442
https://bugzilla.mozilla.org/show_bug.cgi?id=769108
http://www.ubuntu.com/usn/USN-1548-2
http://www.ubuntu.com/usn/USN-1548-1
http://www.mozilla.org/security/announce/2012/mfsa2012-60.html
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00014.html
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00028.html