WebKit, as used in Apple Safari before 4.1.3 and 5.0.x before 5.0.3, Google Chrome before 6.0.472.53, and webkitgtk before 1.2.6, does not properly restrict read access to images derived from CANVAS elements, which allows remote attackers to bypass the Same Origin Policy and obtain potentially sensitive image data via a crafted web site.
http://code.google.com/p/chromium/issues/detail?id=53001
http://googlechromereleases.blogspot.com/2010/09/stable-and-beta-channel-updates.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
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.securityfocus.com/bid/44206
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
http://www.vupen.com/english/advisories/2011/0216
http://www.vupen.com/english/advisories/2011/0552
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11221