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CERT Coordination Center

IBM AIX nslookup buffer overflow in hostname to lookup

Vulnerability Note VU#872443

Original Release Date: 2001-09-26 | Last Revised: 2001-09-26


There is a buffer overflow in nslookup that will allow local attackers to gain root privileges on vulnerable AIX systems.


The nslookup command contains a buffer overflow in the hostname to lookup, allowing local attackers to gain root privileges. The vendor (IBM) has reported publicly that this buffer overflow has been exploited by intruders to gain privileges.


Intruders with access to a local account may be able to gain root privileges on the vulnerable system.


Apply a Patch

IBM has released patches to correct this problem. For AIX version 4.3, system administrators should apply APAR#IY02120.

Vendor Information

Affected   Unknown   Unaffected


Updated:  September 26, 2001



Vendor Statement

Information about this vulnerability is available at:

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



This document was written by Cory F. Cohen.

Other Information

CVE IDs: None
Severity Metric: 15.75
Date Public: 1999-09-30
Date First Published: 2001-09-26
Date Last Updated: 2001-09-26 18:04 UTC
Document Revision: 7

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