Re: SSL/TLS: Revealing information about the trusted authorities

2011-07-31 Thread Kyle Hamilton
The names of the CAs accepted are already supposed to be sent as part of the negotiation. It wasn't until after TLSv1.0 that the spec permitted a wildcard CA name list. This kind of information-leakage being a vulnerability also depends on the application being authentication-naive. A web ap

SSL/TLS: Revealing information about the trusted authorities

2011-07-31 Thread Martin Boßlet
Hello, if we do SSL/TSL client authentication, the current OpenSSL 1.0.0d verifies the client certificate upon reception of the Client Certificate message. Let's consider I want to find out whether the server trusts a certain CA I as an attacker am planning to compromise. I would send some certif