WebKit in Apple Safari before 5.0 on Mac OS X 10.5 through 10.6 and Windows, and before 4.1 on Mac OS X 10.4, sends an https URL in the Referer header of an http request in certain circumstances involving https to http redirection, which allows remote HTTP servers to obtain potentially sensitive information via standard HTTP logging, a related issue to CVE-2010-0660.
lists.apple.com/archives/security-announce/2010/Jun/msg00000.html
lists.apple.com/archives/security-announce/2010/Jun/msg00003.html
lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html
secunia.com/advisories/40105
secunia.com/advisories/41856
secunia.com/advisories/43068
securitytracker.com/id?1024067
support.apple.com/kb/HT4196
support.apple.com/kb/HT4225
www.mandriva.com/security/advisories?name=MDVSA-2011:039
www.securityfocus.com/bid/40620
www.ubuntu.com/usn/USN-1006-1
www.vupen.com/english/advisories/2010/1373
www.vupen.com/english/advisories/2010/2722
www.vupen.com/english/advisories/2011/0212
www.vupen.com/english/advisories/2011/0552
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7197