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Nortel CS1000 Denial of Service Vulnerability

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Release Date:  2007-10-18    Last Update:  2007-10-23    Views:  9,231

Secunia Advisory SA27282

Where:

From local network

Impact:

DoS

Solution Status:

Vendor Workaround

CVE Reference(s):

Description


A vulnerability has been reported in Nortel CS1000, which potentially can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an unspecified error within the processing of packets received through certain ELAN (Embedded LAN) ports, e.g 7734/TCP, 15000/TCP, 15080/TCP, and 15000/UDP. This can potentially be exploited to disable the affected server by flooding specific ELAN ports.

The vulnerability is reported in the following products:
* Enterprise VoIP-Core-CS 1000M Chassis/Cabinet
* Enterprise VoIP-Core-CS 1000E and 1000S
* Meridian-Core-Option 11C - Chassis/Cabinet
* Meridian-Core-Option 51C, 61C, and 81C


Solution:
The vendor recommends that customers restrict direct access to the ELAN from unknown devices.

Provided and/or discovered by:
Daniel Stirnimann and Cyrill Brunschwiler, Compass Security Network Computing AG.

Original Advisory:
Nortel:
http://www116.nortel.com/pub/repository/CLARIFY/DOCUMENT/2007/42/022871-01.pdf

Compass Security Network Computing AG:
http://www.csnc.ch/static/advisory/csnc/nortel_telephony_server_denial_of_service_v1.0.txt

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Nortel CS1000 Denial of Service Vulnerability

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