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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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Vulnerability Assessment Details

Ftp PASV denial of service

Vulnerability Assessment Summary
Acertains if a PASV DoS is feasible

Detailed Explanation for this Vulnerability Assessment
The remote FTP server permits users to make any amount
of PASV commands, thus blocking the free ports for legitimate services and
consuming file descriptors.

Solution: upgrade your FTP server to a version which solves this problem.

Network Security Threat Level: Medium

Networks Security ID: 271

Vulnerability Assessment Copyright: This script is Copyright (C) 1999 Renaud Deraison

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