full-disclosure - Internet Explorer valid JavaScript-file successfull load detection local file enumeration

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Message-ID: <002c01c4fa1c$25d87eb0$0100a8c0@grotedoos>
From: skylined at edup.tudelft.nl (Berend-Jan Wever)
Subject: Internet Explorer valid JavaScript-file
	successfull load detection local file enumeration

Hi all,

Internet Explorer allows webpages on a remote server to load scripts from the local harddisk. These scripts get run in the remote server's security zone. This is not so much cross-site scripting but what I will call "cross-site loading" for now. Cross-site loading is not a new problem, a number of these bugs have been found already, most of which have not been fixed yet, even though the problem is over two years old now. 

Anyway, using this variant I constructed a webpage that will try to load a JavaScript that is present by default on win2k from various locations on your harddisk(s). If it succeeds, one can assume this is the windows installation directory.

Demo and example:
http://www.edup.tudelft.nl/~bjwever/advisory_ie_flaws.html.php
(I also added demos and examples for two other old, known and unfixed cross-site loading problems).

FireFox does not allow any cross-site loading as far as I could tell, all three demo's do not work on it for that matter.

Cheers,

Berend-Jan Wever
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