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