If at first you don't succeed; call it version 1.0
Sunday, 18 March 2007

One of the comments for my post on the phishing hole in IE7 was that the anti-phishing tool of the browser will detect scams exploiting this vulnerability, because it will check the external javascript reference (e.g. In my PoC - http://www.raffon.net/research/ms/ie/navcancl/phish.js). I’m not an IE7 anti-phishing  internals guru, so I’ve decided to test it.
I’ve searched for a list of live phishing sites and found millersmiles.co.uk anti-phishing service. From the list I chose http://pqpal.com/cgi-bin/index.htm, which is a paypal phishing page.  IE7’s anti-phishing tool reports this as a phishing website.
To be able to use this phishing URL in my test, I’ve created a local DNS entry for pqpal.com and set it to my local web server.
To verify that the anti-phishing tool actually works with this local DNS entry, I’ve loaded the phishing URL in IE7, and got the phishing warning page again.
Next, I’ve created index.htm file under cgi-bin directory on my local web server. This file simply contains: alert(“Hello from phishing site!”);
For the proof-of-concept, I’ve created a HTML file with a reference to the external script - http://pqpal.com/cgi-bin/index.htm. When I’ve loaded this HTML file in IE7,  I got the “Hello from phishing site!” alert box, and no indication that this comes from a phishing URL.
This means that IE7 anti-phishing tool DOES NOT block pages with external scripts that points to a flagged URL. So, unless Microsoft will flag the navcancl.htm local resource as a phishing page, I see no other way for IE7 anti-phishing tool to detect phishing scams exploiting this vulnerability.
Again, until this vulnerability is fixed by Microsoft, do not trust any link in the “Navigation Canceled” page.

The proof-of-concept HTML file can be found here.

Sunday, 18 March 2007 08:39:12 UTC | Comments [2] | Security#
Sunday, 18 March 2007 14:42:39 UTC
you didn't get a warning from http://pqpal.com/cgi-bin/index.htm because that site doesn't work i.e it's off line
Sunday, 18 March 2007 18:17:50 UTC
Yes, now the pqpal.com site is down. But, when I performed the test, it was up and running.
You can go and pickup from millersmiles.co.uk a different live phishing site, and test it yourself.
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The opinions expressed herein are my own personal opinions and do not represent my employer's view in anyway.