CVE-2015-6997 Information

Description

The X.509 certificate-trust implementation in Apple iOS before 9.1 does not recognize that the kSecRevocationRequirePositiveResponse flag implies a revocation-checking requirement which makes it easier for man-in-the-middle attackers to spoof endpoints by leveraging access to a revoked certificate.

Reference

http://lists.apple.com/archives/security-announce/2015/Dec/msg00002.html http://lists.apple.com/archives/security-announce/2015/Oct/msg00002.html http://www.securityfocus.com/bid/77268 http://www.securitytracker.com/id/1033929 https://support.apple.com/HT205370 https://support.apple.com/HT205641