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CERT Coordination Center

IBM AIX portmir buffer overflow

Vulnerability Note VU#18500

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

Overview

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

Description

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.

Impact

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

Solution

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

18500
 

IBM Affected

Updated:  June 21, 1998

Status

Affected

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.

Addendum

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.


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References

Acknowledgements

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: 10

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