full-disclosure - Re: Firefox 2.0.0.12 SSL Spoofing and Domain Guessing vulnerabilities

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Date: Mon, 04 Feb 2008 23:18:15 -0500
From: "Joey Mengele" <joey.mengele@...hmail.com>
To: <smenard@...et.nb.ca>, <full-disclosure@...ts.grok.org.uk>,
	<larry@...ryseltzer.com>
Cc: hardwick.carl@...il.com
Subject: Re: Firefox 2.0.0.12 SSL Spoofing and Domain
	Guessing vulnerabilities

Confirmed on emacs on freebsd running on an alpha.

J

On Mon, 04 Feb 2008 18:49:59 -0500 Larry Seltzer 
<Larry@...ryseltzer.com> wrote:
>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@...fdavisenterprise.com
>
>
>-----Original Message-----
>From: full-disclosure-bounces@...ts.grok.org.uk
>[mailto:full-disclosure-bounces@...ts.grok.org.uk] On Behalf Of 
>steve
>menard
>Sent: Monday, February 04, 2008 3:36 PM
>To: full-disclosure@...ts.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@...om%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@...uehost.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@...gle
>> www.gmail.com%C0%AF%C0%AF%C0%C0%80@...mail
>>
>> ah heck we don't need that at all:
>> 
>www.gmail.comxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx@
>hot
>> mail
>>
>> works fine also :)
>>
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>
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