nsFrameManager in Firefox 3.x before 3.0.4, Firefox 2.x before 2.0.0.18, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code by modifying properties of a file input element while it is still being initialized, then using the blur method to access uninitialized memory.
https://www.redhat.com/archives/fedora-package-announce/2008-November/msg00385.html
https://www.redhat.com/archives/fedora-package-announce/2008-November/msg00366.html
https://bugzilla.mozilla.org/show_bug.cgi?id=460002
http://www.us-cert.gov/cas/techalerts/TA08-319A.html
http://www.mozilla.org/security/announce/2008/mfsa2008-55.html
http://www.debian.org/security/2009/dsa-1697
http://www.debian.org/security/2009/dsa-1696
http://www.debian.org/security/2008/dsa-1671
http://www.debian.org/security/2008/dsa-1669
http://ubuntu.com/usn/usn-667-1
http://lists.opensuse.org/opensuse-security-announce/2008-11/msg00004.html