A vulnerability has been identified in Windows NetMeeting, which can be exploited by malicious people to overwrite arbitrary files on a user's system with the privileges of the user.
The vulnerability is caused due to an input validation error in the file transfer functionality. By specifying a filename starting with the character sequence "..\", it is possible to traverse out of the directory used to receive files. This could potentially overwrite other files on a user's system, which may result in execution of arbitrary code.
The vulnerability has been reported in version 3.01 (4.4.3385). However, other versions may also be vulnerable.
Solution: Reportedly, the vulnerability has been fixed in Windows 2000 SP4 and Windows XP SP1.
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Subject: Windows NetMeeting Directory Traversal Vulnerability
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