Google Chrome before 8.0.552.215 does not properly restrict read access to videos derived from CANVAS elements, which allows remote attackers to bypass the Same Origin Policy and obtain potentially sensitive video data via a crafted web site.
https://technet.microsoft.com/library/security/msvr11-002
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11610
http://secunia.com/advisories/42472
http://googlechromereleases.blogspot.com/2010/12/stable-beta-channel-updates.html