full-disclosure - Re: Facebook URL Redirect Vulnerability

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Date: Wed, 2 Mar 2011 09:30:51 -0500
From: Nathan Power <np@...uritypentest.com>
To: Andrew Farmer <andfarm@...il.com>
Cc: Full Disclosure <full-disclosure@...ts.grok.org.uk>
Subject: Re: Facebook URL Redirect Vulnerability

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?

To be clear - I was trying to make a point when determining the impact, once
you click on a bad link, bad things will happen.

Nathan Power
www.securitypentest.com

On Tue, Mar 1, 2011 at 8:56 PM, Andrew Farmer <andfarm@...il.com> wrote:

> On 2011-02-28, at 09:42, Nathan Power wrote:
> > 3. Impact:
> >
> > Potentially allow an attacker to compromise a victim’s Facebook account
> > and/or computer system.
>
> Do you have an actual attack in mind which could accomplish either of these
> goals, or is this wishful thinking? (Browser exploits don't really count, as
> those would work just fine with or without the redirect.)
>
> To be clear - open redirects are certainly a problem, but don't try to call
> them any more than that.

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