The implementation of Cross-Origin Resource Sharing (CORS) in WebKit, as used in Apple Safari before 4.0.4 and Google Chrome before 3.0.195.33, includes certain custom HTTP headers in the OPTIONS request during cross-origin operations with preflight, which makes it easier for remote attackers to conduct cross-site request forgery (CSRF) attacks via a crafted web page.
https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00549.html
https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00545.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6516
https://exchange.xforce.ibmcloud.com/vulnerabilities/54239
https://bugzilla.redhat.com/show_bug.cgi?id=525789
http://www.vupen.com/english/advisories/2011/0212
http://www.vupen.com/english/advisories/2009/3233
http://www.vupen.com/english/advisories/2009/3217
http://www.securitytracker.com/id?1023165
http://www.securityfocus.com/bid/36997
http://support.apple.com/kb/HT4225
http://support.apple.com/kb/HT3949
http://secunia.com/advisories/43068
http://secunia.com/advisories/37397
http://secunia.com/advisories/37393
http://secunia.com/advisories/37358
http://secunia.com/advisories/37346
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html
http://lists.apple.com/archives/security-announce/2010/Jun/msg00003.html
http://lists.apple.com/archives/security-announce/2009/Nov/msg00001.html