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Lotus Domino vulnerable to a denial of service via DOS device request

Vulnerability Note VU#890128

Original Release Date: 2001-07-12 | Last Revised: 2001-07-12


The Lotus Domino Web Server contains a flaw that could be exploited to cause a denial-of-service situation on the Windows and OS/2 Platforms.


With the Lotus Domino Web Server, you can access DOS-devices. If this is done through the cgi-bin directory, a ncgihttp.exe process will be opened to handle the execution of the request. A flaw exists where this processing will not finish. After numerous requests have been made, the server will no longer respond to requests on tcp port 80.


A denial of service results on Windows and OS/2 platforms.


Upgrade to Notes/Domino 5.0.7 or later. See

If possible, disable access to DOS-Devices through the web server's cgi-bin directory. An application layer filter may be able to detect and block such requests.

Vendor Information


Lotus Affected

Notified:  October 16, 2000 Updated: July 12, 2001



Vendor Statement

[We] have addressed the issues reported to us by Defcom in R5.0.7

Vendor Information

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


See also

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Our thanks to Defcom Labs, who published an advisory on this and other problems, available at

This document was written by Jason Rafail and is based on information obtained from a Defcom Labs Advisory.

Other Information

CVE IDs: None
Severity Metric: 5.07
Date Public: 2001-04-11
Date First Published: 2001-07-12
Date Last Updated: 2001-07-12 20:43 UTC
Document Revision: 18

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