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.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Iphone_os | Apple | * | 9.0.2 (including) |
References
- 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
- 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