A security vulnerability exists in Microsoft MSN Messenger. The vulnerability exists because of the method used by MSN Messenger to handle a file request. An attacker could exploit this vulnerability by sending a specially crafted request to a user running MSN Messenger. If exploited successfully, the attacker could view the contents of a file on the hard drive without the user's knowledge as long as the attacker knew the location of the file and the user had read access to the file.
To exploit this vulnerability, an attacker would have to know the sign-on name of the MSN Messenger user in order to send the request.
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