Re[2]: Microsoft FTP Client Multiple Bufferoverflow Vulnerability

Dear Valdis.Kletnieks@xxxxxx,



--Friday, November 30, 2007, 1:19:49 AM, you wrote to 3APA3A@xxxxxxxxxxxxxxxx:


An attacker who can convince an user to extract a specially crafted
archive can overwrite arbitrary files with the permissions of the user
running gtar. If that user is root, the attacker can overwrite any
file on the system.

VKve> Apparently, somebody at FreeBSD thinks "can be exploited if you trick the
VKve> user into doing something" is a valid attack vector.

This is valid factor. The difference is, if you can force user to
extract archive, you need vulnerability in gtar in order to exploit. If
you can force user to run executable script, you need no vulnerability
in FTP client to exploit this.


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