The SSLVerifySignedServerKeyExchange function in libsecurity_ssl/lib/sslKeyExchange.c in the Secure Transport feature in the Data Security component in Apple iOS 6.x before 6.1.6 and 7.x before 7.0.6, Apple TV 6.x before 6.0.2, and Apple OS X 10.9.x before 10.9.2 does not check the signature in a TLS Server Key Exchange message, which allows man-in-the-middle attackers to spoof SSL servers by (1) using an arbitrary private key for the signing step or (2) omitting the signing step.
Weakness
The product does not validate, or incorrectly validates, a certificate.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Iphone_os | Apple | 6.0 (including) | 6.1.6 (excluding) |
| Iphone_os | Apple | 7.0 (including) | 7.0.6 (excluding) |
| Mac_os_x | Apple | 10.9 (including) | 10.9.2 (excluding) |
| Tvos | Apple | 6.0 (including) | 6.0.2 (excluding) |
Potential Mitigations
Related Attack Patterns
References
- http://it.slashdot.org/comments.pl?sid=4821073\u0026cid=46310187
- http://support.apple.com/kb/HT6146
- http://support.apple.com/kb/HT6147
- http://support.apple.com/kb/HT6148
- http://support.apple.com/kb/HT6150
- https://news.ycombinator.com/item?id=7281378
- https://www.cs.columbia.edu/~smb/blog/2014-02/2014-02-23.html
- https://www.cs.columbia.edu/~smb/blog/2014-02/2014-02-24.html
- https://www.imperialviolet.org/2014/02/22/applebug.html
- http://it.slashdot.org/comments.pl?sid=4821073\u0026cid=46310187
- http://support.apple.com/kb/HT6146
- http://support.apple.com/kb/HT6147
- http://support.apple.com/kb/HT6148
- http://support.apple.com/kb/HT6150
- https://news.ycombinator.com/item?id=7281378
- https://www.cs.columbia.edu/~smb/blog/2014-02/2014-02-23.html
- https://www.cs.columbia.edu/~smb/blog/2014-02/2014-02-24.html
- https://www.imperialviolet.org/2014/02/22/applebug.html