[Full-disclosure] Firefox 2.0.0.12 SSL Spoofing and Domain Guessing vulnerabilities

[carl hardwick]

Firefox seems to have trouble with defining the proper hostname when
requesting a ssl connection. I was able to trick Firefox in thinking
the hostname behind the at-sign is legit and the same as the URI that
requested an ssl connection, and this without a warning.

PoC: https://www.gmail.com%C0%AF%C0%AF%C0%C0%80@roguehost.com

You can add as much garbage between .com and the @ sign.

So what else can we do?

PoC:
www.cnn.com%C0%AF%C0%AF%C0%C0%80 at google
www.gmail.com%C0%AF%C0%AF%C0%C0%80 at hotmail

ah heck we don't need that at all:
www.gmail.comxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx at hotmail

works fine also :)