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.
code.google.com/p/chromium/issues/detail?id=53001
googlechromereleases.blogspot.com/2010/09/stable-and-beta-channel-updates.html
lists.apple.com/archives/security-announce/2010//Nov/msg00002.html
lists.apple.com/archives/security-announce/2010//Nov/msg00003.html
lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html
secunia.com/advisories/41856
secunia.com/advisories/42314
secunia.com/advisories/43068
secunia.com/advisories/43086
support.apple.com/kb/HT4455
support.apple.com/kb/HT4456
www.mandriva.com/security/advisories?name=MDVSA-2011:039
www.redhat.com/support/errata/RHSA-2011-0177.html
www.securityfocus.com/bid/44206
www.ubuntu.com/usn/USN-1006-1
www.vupen.com/english/advisories/2010/2722
www.vupen.com/english/advisories/2010/3046
www.vupen.com/english/advisories/2011/0212
www.vupen.com/english/advisories/2011/0216
www.vupen.com/english/advisories/2011/0552
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11221
technet.microsoft.com/library/security/msvr11-002