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

From: steve menard (smenardnbnet.nb.ca)
Date: Mon Feb 04 2008 - 14:36:20 CST

I get a warning on 2.0.0.11 Linux Ubuntu

You are about to log into the site "google" with the username
"www%2Ecnn2Ecom%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%80roguehost.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%80google
> www.gmail.com%C0%AF%C0%AF%C0%C0%80hotmail
>
> ah heck we don't need that at all:
> www.gmail.comxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxhotmail
>
> works fine also :)
>
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
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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/