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Date: Mon, 8 Jan 2007 13:26:49 -0600
From: "Tom Stripling" <>
To: "Brian Eaton" <>,
	"RSnake" <>
Cc: "Amit Klein" <>, <>,
	"Web Security" <>
Subject: RE: [WEB SECURITY] Universal XSS with PDF files: highly dangerous


You can't access local pages directly, but there are ways around that
restriction.  For example, someone on this list (I forget where I first
read this, sorry) wrote about a quicktime exploit using qtl files that
allows you to access a local file from a remote site.  I've been able to
use this to exploit the PDF plugin vulnerability in a local context from
a remote web page.  The file would look something like this:

<?xml version="1.0"?>
<?quicktime type="application/x-quicktime-media-link"?>
<embed src="a.mp3" autoplay="true"

It works like a charm.  So essentially, anyone on the Internet able to
run JavaScript or otherwise get me to open this file could read all the
files off of my hard drive, if I were vulnerable.  Scary.


Tom Stripling, CISSP, CISA | Senior Security Consultant | Security PS
[office - 913.888.2111 x6142 | mobile - 913.488.9712]

-----Original Message-----
From: Brian Eaton [] 
Sent: Monday, January 08, 2007 1:07 PM
To: RSnake
Cc: Amit Klein;; Web Security
Subject: Re: [WEB SECURITY] Universal XSS with PDF files: highly

Someone (I believe RSnake) pointed out that many browser machines have
PDF files in predictable locations that can be accessed via file://
links.  That lets an attacker gain local javascript execution.  At one
point Firefox had a rule restricting http:// and https:// web pages from
accessing file:// links.  Does that rule still exist, and if so does it
mitigate the risk posed to firefox users?


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