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CERT Coordination Center

Lotus Domino R5 Server vulnerable to DoS via nmap RPC scan on port 443/tcp

Vulnerability Note VU#332299

Original Release Date: 2001-12-04 | Last Revised: 2001-12-04


Versions earlier than 5.0.9 of Lotus Domino R5 Servers with Secure Socket Layer (SSL) enabled are vulnerable to a denial of sevice.


A remote user is able to crash the HTTP serving process on any Lotus Domino R5 Server using the nmap utility. Sending a request to port 443, the browser SSL port, will cause the HTTP server to stop responding.


A denial of service is caused.


Lotus has released R5.0.9 to address this.

Disable SSL. Apply an application layer filter to block scans connections to port 443.

Vendor Information

Affected   Unknown   Unaffected


Notified:  June 28, 2001 Updated:  July 17, 2001



Vendor Statement

Yes, the customer reported this to our support center as incident number #1390904. Lotus reproduced the problem and documented it as SPR #MALR4Y6RL8, which is currently planned to be addressed in R5.0.9. The status of the SPR is that a fix has been submitted, and is currently being tested. It affects all currently released versions of Domino R5.

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.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A



Our thanks to Mike Priest, who discovered this problem and reported it to Lotus and the CERT/CC.

This document was written by Jason Rafail.

Other Information

CVE IDs: None
Severity Metric: 7.51
Date Public: 2001-11-30
Date First Published: 2001-12-04
Date Last Updated: 2001-12-04 16:29 UTC
Document Revision: 14

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