The image decoder in WebKit before r52833, as used in Google Chrome before 4.0.249.78, does not properly handle a failure of memory allocation, which allows remote attackers to execute arbitrary code in the Chrome sandbox via a malformed GIF file that specifies a large size.
code.google.com/p/chromium/issues/detail?id=28566
googlechromereleases.blogspot.com/2010/01/stable-channel-update_25.html
lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html
secunia.com/advisories/43068
securitytracker.com/id?1023506
sites.google.com/a/chromium.org/dev/Home/chromium-security/chromium-security-bugs
trac.webkit.org/changeset/52833
www.vupen.com/english/advisories/2011/0212
bugs.webkit.org/show_bug.cgi?id=33231
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14079