Re: Firefox 2.0.0.12 SSL Spoofing and Domain Guessing vulnerabilities

["Larry Seltzer" <Larry () larryseltzer com>]

I get this same warning on FF 3.0 beta 2 on Vista.

Larry Seltzer
eWEEK.com Security Center Editor
http://security.eweek.com/
http://blogs.pcmag.com/securitywatch/
Contributing Editor, PC Magazine
larry.seltzer () ziffdavisenterprise com


-----Original Message-----
From: full-disclosure-bounces () lists grok org uk
[mailto:full-disclosure-bounces () lists grok org uk] On Behalf Of steve
menard
Sent: Monday, February 04, 2008 3:36 PM
To: full-disclosure () lists grok org uk
Cc: carl hardwick
Subject: 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 () 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@google
> www.gmail.com%C0%AF%C0%AF%C0%C0%80@hotmail
>
> ah heck we don't need that at all:
> www.gmail.comxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx@hot
> mail
>
> 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/