Apple is releasing some updates today. They have not published the bulletins yet, but they are available here: https://gist.github.com/FredericJacobs/11189734.
In the writeup for CVE-2014-1295:
Security - Secure Transport ... Impact: An attacker with a privileged network position may capture data or change the operations performed in sessions protected by SSL Description: In a 'triple handshake' attack, it was possible for an attacker to establish two connections which had the same encryption keys and handshake, insert the attacker's data in one connection, and renegotiate so that the connections may be forwarded to each other. To prevent attacks based on this scenario, Secure Transport was changed so that, by default, a renegotiation must present the same server certificate as was presented in the original connection.
How is it possible to run two instances of a protocol and get the same parameters? Wouldn't nonces specifically neutralize this attack?
(And sorry about the crummy tagging).