full-disclosure - Re: Facebook URL Redirect Vulnerability

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Date: Wed, 2 Mar 2011 11:38:07 -0800
From: Andrew Farmer <andfarm@...il.com>
To: Nathan Power <np@...uritypentest.com>
Cc: Full Disclosure <full-disclosure@...ts.grok.org.uk>
Subject: Re: Facebook URL Redirect Vulnerability

On 2011-03-02, at 06:30, Nathan Power wrote:
> There are 3 different steps to perform an attack using a URL redirect:  1)
> trick the user 2) redirect 3) exploit .. We are using a Facebook URL to
> trick the user, we are using the URL redirect as the catalyst to perform an
> exploit.
> 
> Here are some examples of the types of attacks you can perform with a URL
> redirect, CSRF, phishing (fake fb login), and browser exploits (javascript
> zombie,0days,etc).
> 
> How would you have written the impact section?

Something like this:

> 3. Impact:
> 
> An attacker may obfuscate the target of a link, potentiating phishing attacks and/or bypassing some simple URL filters.

Or something of the sort. The actual target of the link isn't obscured in the URL, so it's not even particularly convincing if the URL is displayed in plain text.
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