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CERT Coordination Center

WS-FTP Server vulnerable to buffer overflow via long string sent as argument to ftp command

Vulnerability Note VU#986843

Original Release Date: 2001-11-06 | Last Revised: 2001-11-06


A remotely exploitable buffer overflow exists in the IPSWITCH WS_FTP Server.


Defcom Labs has discovered a remotely exploitable buffer overflow vulnerability in the IPSWITCH WS_FTP Server (on all platforms) that allows intruders to execute arbitrary code with the privileges of the process running the ftp server, typically SYSTEM. This buffer overflow exists in all versions of WS_FTP Server prior to 2.04. The buffer overflow occurs in the section of code that handles stat command parsing.


Remote intruders can execute arbitrary code on the target host with SYSTEM privileges.


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Vendor Information

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Notified:  August 08, 2001 Updated:  November 06, 2001



Vendor Statement

Please see

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


The CERT/CC has no additional comments at this time.

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CVSS Metrics

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Environmental N/A



This vulnerability was discovered by Defcom Labs.

This document was written by Ian A. Finlay.

Other Information

CVE IDs: None
Severity Metric: 22.44
Date Public: 2001-11-05
Date First Published: 2001-11-06
Date Last Updated: 2001-11-06 15:21 UTC
Document Revision: 14

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