Summary
Attackers can turn a media (directory, drive, mail, ...) into a small attacking program allowing it to crash any application that would try to access it using SHELL32.DLL library (Explorer, IE, Outlook).
Details
As a user browses through his hard-drive, Windows automatically analyses every file of the current directory, so as to allow the system to display the matching icon as well as file informations.
When Windows must analyse a shortcut (*.lnk), the system determines the properties of the file indicated by the link using its structure
Solution:
Microsoft was notified on 11/17/2003 and are planning on getting this fixed as part of the next service pack.
http://www.securiteam.com/windowsntfocus/6X00B0A95I.html

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