search menu icon-carat-right cmu-wordmark

CERT Coordination Center

IBM AIX portmir buffer overflow

Vulnerability Note VU#18500

Original Release Date: 2001-09-26 | Last Revised: 2001-09-27


There is a buffer overflow vulnerability in the AIX portmir command that may allow local attackers to gain root privileges.


There is a buffer overflow in the AIX portmir command. This problem was described in IBM ERS security bulletin: ERS-SVA-E01-1997:006.1.


Attackers with access to a local user account may gain root privileges.


Apply a Patch

IBM has released patches to correct this problem. For AIX version 4.2.1, system administrators should apply APAR#IX71795.

Disable the setuid bit on the portmir command

Disabling the setuid bit on the portmir command will prevent this vulnerability from being exploited. ?You can do this by running the following command as root:

chmod u-s /usr/sbin/portmir

Vendor Information

Expand all


Updated:  June 21, 1998



Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

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: CVE-1999-0092
Severity Metric: 4.31
Date Public: 1997-10-29
Date First Published: 2001-09-26
Date Last Updated: 2001-09-27 18:58 UTC
Document Revision: 9

Sponsored by the Department of Homeland Security Office of Cybersecurity and Communications.