full-disclosure - Re: Drive-by Pharming Threat

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Date: Tue, 20 Feb 2007 12:11:01 +0100
From: Jeremy Saintot <jeremy.saintot@...e.fr>
To: auto400208@...hmail.com
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Subject: Re: Drive-by Pharming Threat

auto400208@...hmail.com wrote:
> I am curious as to how one "automatically" logs on?
> 
> 1. Internet Explorer disallows username:pass@http://192.168.1.0
> 2. Opera has a very clear warning that you are logging on
> 3. Firefox has a very clear warning that you are logging on
> 
> Are there any other methods to log on without any warning? If so
> does it work with Internet Explorer?  Also when you do reset or
> change parameters in the router, does it not require a reboot of
> the router (auto after you hit save), whereby your connection is
> lost for x amount of time?
> 

   I did not test that, but I think some routers use HTML forms to log in to 
the admin panel.  In this case, you should be able to use CSRF with AJAX xhr 
objects, or simple Javascript to auto-submit the form.  Once the browser is 
logged in, it could use the same process and submit forms to change 
configuration settings such as DNS servers (for this attack) and more.

Regards,

Jeremy Saintot

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