full-disclosure - Re: Universal XSS with PDF files: highly dangerous

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Date: Fri, 5 Jan 2007 15:53:30 +0200
From: Kristina Lein <kristina@....ee>
To: full-disclosure@...ts.grok.org.uk
Cc: bugtraq@...urityfocus.com,
	"pdp \(architect\)" <pdp.gnucitizen@...glemail.com>,
	Web Security <websecurity@...appsec.org>
Subject: Re: Universal XSS with PDF files: highly dangerous

On Wednesday 03 January 2007 04:20, pdp (architect) wrote:
> I will be very quick and just point to links where you can read about
> this issue.
>
> It seams that PDF documents can execute JavaScript code for no
> apparent reason by using the following template:
>
>    
> http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_her
>e
>
> You must understand that the attacker doesn't need to have write
> access to the specified PDF document. In order to get an XSS vector
> working you need to have a PDF file hosted on the target and that's
> all about it. The rest is just a matter of your abilities and desires.

Even more, maybe it is possible to modify content of PDF with this method. 
Some way (I have not tried though) described here;

http://www.planetpdf.com/developer/article.asp?ContentID=6904

Need to write POC

Also I have to tell that my firefox crashed when I appended some random 
document.write('foobar') to exploit. I suppose it wrote it to PDF memory?! In 
this case we maybe can also execute code? Scary.

  Tõnu

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