Multiple use-after-free vulnerabilities in WebKit, as used in Apple Safari before 4.1.3 and 5.0.x before 5.0.3, Google Chrome before 5.0.375.127, and webkitgtk before 1.2.6, allow remote attackers to execute arbitrary code or cause a denial of service (application crash) via vectors related to improper handling of MIME types by plug-ins.
http://code.google.com/p/chromium/issues/detail?id=50515
http://code.google.com/p/chromium/issues/detail?id=51835
http://googlechromereleases.blogspot.com/2010/08/stable-channel-update_19.html
http://lists.apple.com/archives/security-announce/2010//Nov/msg00002.html
http://lists.apple.com/archives/security-announce/2010//Nov/msg00003.html
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html
http://secunia.com/advisories/41856
http://secunia.com/advisories/42314
http://secunia.com/advisories/43068
http://secunia.com/advisories/43086
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11909
http://support.apple.com/kb/HT4455
http://support.apple.com/kb/HT4456
http://www.mandriva.com/security/advisories?name=MDVSA-2011:039
http://www.redhat.com/support/errata/RHSA-2011-0177.html
http://www.ubuntu.com/usn/USN-1006-1
http://www.vupen.com/english/advisories/2010/2722
http://www.vupen.com/english/advisories/2010/3046
http://www.vupen.com/english/advisories/2011/0212