Mozilla Firefox 3.0.7 on Windows 7 allows remote attackers to execute arbitrary code via unknown vectors related to the _moveToEdgeShift XUL tree method, which triggers garbage collection on objects that are still in use, as demonstrated by Nils during a PWN2OWN competition at CanSecWest 2009.
https://www.redhat.com/archives/fedora-package-announce/2009-March/msg01077.html
https://www.redhat.com/archives/fedora-package-announce/2009-March/msg01040.html
https://www.redhat.com/archives/fedora-package-announce/2009-March/msg01023.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11368
https://bugzilla.mozilla.org/show_bug.cgi?id=484320
http://www.zerodayinitiative.com/advisories/ZDI-09-015
http://www.vupen.com/english/advisories/2009/0864
http://www.ubuntu.com/usn/usn-745-1
http://www.securitytracker.com/id?1021878
http://www.securityfocus.com/bid/34181
http://www.securityfocus.com/archive/1/502303/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2009-0398.html
http://www.redhat.com/support/errata/RHSA-2009-0397.html
http://www.mozilla.org/security/announce/2009/mfsa2009-13.html
http://www.mandriva.com/security/advisories?name=MDVSA-2009:084
http://www.h-online.com/security/Pwn2Own-2009-Safari-IE-8-and-Firefox-exploited--/news/112889
http://www.debian.org/security/2009/dsa-1756
http://twitter.com/tippingpoint1/status/1351635812
http://support.avaya.com/elmodocs2/security/ASA-2009-113.htm
http://secunia.com/advisories/34792
http://secunia.com/advisories/34550
http://secunia.com/advisories/34549
http://secunia.com/advisories/34527
http://secunia.com/advisories/34521
http://secunia.com/advisories/34511
http://secunia.com/advisories/34510
http://secunia.com/advisories/34505
http://secunia.com/advisories/34471
http://news.cnet.com/8301-1009_3-10199652-83.html
http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00008.html
http://dvlabs.tippingpoint.com/blog/2009/02/25/pwn2own-2009
http://cansecwest.com/index.html