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Note: This vulnerability as well as several more can be found at http://www.geryhats.cjb.net
Media Preview Script Execution Vulnerability
[Tested]
MSDXM.DLL file version 6.4.09.1128
Microsoft Windows 2000
[Discussion]
By using the windows media player control, media can be played in a browser, including asx
files, which is just a playlist of media. If one of these files on the list is a weird protocol
like javascript:, it will be executed in the zone of the page that called it. At first, this
seems to be a small problem. However, on windows 2000, media can be previewed on a panel to the
left if the media file is in a local directory and the user clicks on it. The panel uses the
windows media player control to preview the media. If a user clicks on a specially-crafted asx
file, javascript will be executed in the local zone.
The example is a vulnerable asx file which, when clicked in explorer, will display a messagebox
wiith the location of the directory.
Note: The asx file must be opened in the media player control. It will not work if opened in
windows media player itself.
[Example]
http://freehost07.websamba.com/greyhats/asxvuln.htm
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