The Math.random function in the JavaScript implementation in Mozilla Firefox 3.5.x before 3.5.10 and 3.6.x before 3.6.4, and SeaMonkey before 2.0.5, uses a random number generator that is seeded only once per browser session, which makes it easier for remote attackers to track a user, or trick a user into acting upon a spoofed pop-up message, by calculating the seed value, related to a "temporary footprint" and an "in-session phishing attack."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11139
https://bugzilla.mozilla.org/show_bug.cgi?id=475585
http://www.vupen.com/english/advisories/2010/1773
http://www.vupen.com/english/advisories/2010/1640
http://www.vupen.com/english/advisories/2010/1592
http://www.vupen.com/english/advisories/2010/1557
http://www.vupen.com/english/advisories/2010/1551
http://www.ubuntu.com/usn/usn-930-2
http://www.trusteer.com/files/In-session-phishing-advisory-2.pdf
http://www.securityfocus.com/bid/33276
http://www.redhat.com/support/errata/RHSA-2010-0501.html
http://www.redhat.com/support/errata/RHSA-2010-0500.html
http://www.mozilla.org/security/announce/2010/mfsa2010-33.html
http://www.mandriva.com/security/advisories?name=MDVSA-2010:125
http://www.infoworld.com/article/09/01/13/Browser_bug_could_allow_phishing_without_email_1.html
http://www.darkreading.com/security/attacks/showArticle.jhtml?articleID=212900161
http://ubuntu.com/usn/usn-930-1
http://support.avaya.com/css/P8/documents/100091069
http://secunia.com/advisories/40481
http://secunia.com/advisories/40401
http://secunia.com/advisories/40326
http://lists.opensuse.org/opensuse-security-announce/2010-07/msg00005.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-June/043405.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-June/043369.html