Apple Safari before 6.0.1 makes http requests for https URIs in certain circumstances involving a paste into the address bar, which allows user-assisted remote attackers to obtain sensitive information by sniffing the network.
https://exchange.xforce.ibmcloud.com/vulnerabilities/78680
http://www.securityfocus.com/bid/55626
http://support.apple.com/kb/HT5502
http://lists.apple.com/archives/security-announce/2012/Sep/msg00005.html