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CERT Coordination Center

Avaya Argent Office vulnerable to denial of service via malformed DNS packets

Vulnerability Note VU#981915

Original Release Date: 2003-10-30 | Last Revised: 2003-10-30


The Avaya Argent Office reboots in response to certain malformed DNS packets, resulting in a denial of service condition.


The Avaya Argent Office reboots when a packet with an empty payload is sent to UDP port 53 (DNS) on its internal interface. By sending repeated packets to this interface, it is possible to cause the device to reboot continuously, resulting in a denial of service condition.


This vulnerability allows attackers on the same shared network segment to reboot affected devices, thus creating a denial of service condition.


The CERT/CC is currently unaware of a practical solution to this problem.

Vendor Information

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Notified:  April 03, 2002 Updated:  October 30, 2003



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 vulnerability was reported to the Bugtraq mailing list on 08/07/2001 by Jacek Lipkowski.

This document was written by Jeffrey P. Lanza.

Other Information

CVE IDs: None
Severity Metric: 0.30
Date Public: 2001-08-07
Date First Published: 2003-10-30
Date Last Updated: 2003-10-30 21:49 UTC
Document Revision: 6

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