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IBM Lotus Domino LDAP server DN message heap buffer overflow

Vulnerability Note VU#927988

Original Release Date: 2007-03-28 | Last Revised: 2007-03-28


The IBM Lotus Domino LDAP server is vulnerable to a heap buffer overflow, which may allow a remote, unauthenticated attacker to execute arbitrary code or cause a denial of service.


IBM Lotus Domino server software provides email, calendar, scheduling, and collaboration services. The LDAP component of Lotus Domino is vulnerable to a heap buffer overflow if it handles a DN (Distinguished Name) message with a string larger than 65535 bytes.


A remote, unauthenticated attacker may be able to execute arbitrary code with the privileges of the LDAP server component or cause a denial of service.


Apply an update

This issue is addressed in Lotus Domino 7.0.2 Fix Pack 1 (FP1) and 6.5.6., as specified in IBM Technote 1257248.

Block or restrict access

Block or restrict access to the Lotus Domino LDAP service (typically 389/tcp) from untrusted networks such as the internet.

Vendor Information


IBM Corporation Affected

Updated:  March 28, 2007



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

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


Please see IBM Technote 1257248.

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

CVSS Metrics

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This vulnerability was reported by iDefense Labs, who in turn credit an anonymous discoverer.

This document was written by Will Dormann.

Other Information

CVE IDs: None
Severity Metric: 8.60
Date Public: 2007-03-28
Date First Published: 2007-03-28
Date Last Updated: 2007-03-28 17:44 UTC
Document Revision: 6

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