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Secunia Advisory SA7643

3com NBX FTP Service CEL Command Denial of Service
Secunia Advisory SA7643
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Release Date 2002-12-03
Last Update 2005-06-28
   
Popularity 8,738 views
Comments 0 comments

Criticality level Less criticalLess critical
Impact DoS
Where From local network
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Unpatched
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
Remediation status Secunia VIM
   
Software:
3Com NBX 100 Communications System
3Com SuperStack 3 NBX Networked Telephony Solution

Secunia CVSS Score Available in Customer Area
CVE Reference(s) No CVE references.

  

Description

Michael Scheidell has reported a vulnerability in 3Com SuperStack 3 NBX Networked Telephony Solution and NBX 100 Communications Systems, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the embedded FTP service when processing CEL commands and can be exploited via a CEL command with an overly long argument (about 2048 bytes).

Successful exploitation disables the FTP service, the integrated web-based administrative console, and the call manager. A hard reboot is required to regain functionality.


Solution
Restrict access to the FTP service.

Provided and/or discovered by
Michael Scheidell, SECNAP Network Security.

Changelog
Further details available in Customer Area

Original Advisory
SECNAP Network Security:
http://www.secnap.com/alerts.php?pg=6

Deep Links
Links available in Customer Area


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: 3com NBX FTP Service CEL Command Denial of Service
 
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