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



I get a warning on 2.0.0.11 Linux Ubuntu

You are about to log into the site "google" with the username
"www%2Ecnn@2Ecom%c0%AF%C0%AF%C0%C0%80", but the website does not require
authentication. this may be an attempt to trick you
Is "google" the site you want to visit.?

is this a 2.0.0.12 issue?
Steve

carl hardwick wrote:
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@xxxxxxxxxxxxx

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@google
www.gmail.com%C0%AF%C0%AF%C0%C0%80@hotmail

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

works fine also :)

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_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/



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