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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.

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FTPd tells if a user exists

Vulnerability Assessment Summary CWD ~root Detailed Explanation for this Vulnerability Assessment It is possible to acertain the existence of a user on the remote system by issuing the command CWD ~, like : CWD ~root A possible hacker may use this to acertain the existence of known to be vulnerable accounts (like guest) or to acertain which system you are running. Solution : inform your vendor, and ask for a patch, or change your FTP server Network Security Threat Level: Low Networks Security ID: Vulnerability Assessment Copyright: This script is Copyright (C) 1999 Renaud Deraison

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