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Not critical

Cisco Unified IP Phone Extension Mobility Weakness

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Release Date:  2007-11-29    Last Update:  2007-12-03    Views:  11,158

Secunia Advisory SA27829

Where:

From local network

Impact:

Security Bypass

Solution Status:

Unpatched

Operating System:

CVE Reference(s):

Description


Joffrey Czarney has reported a weakness in Cisco Unified IP Phones, which can be exploited by malicious people to bypass certain security restrictions.

The problem is that the Extension Mobility authentication credentials are not encrypted when communicating with the internal web server of an IP phone. This can be exploited to sniff the authentication credentials and perform various actions on a target IP phone (e.g. remotely login/logout a user or eavesdrop on calls).

Successful exploitation requires that the Extension Mobility feature is enabled (not enabled by default).

The weakness affects all Cisco IP Phones that support the Extension Mobility feature.


Solution:
The vendor has provided some workaround to mitigate this issue. Please see the vendor's advisory for details.

Provided and/or discovered by:
Joffrey Czarney, Telindus

Original Advisory:
Cisco (100252):
http://www.cisco.com/warp/public/707/cisco-sr-20071128-phone.shtml

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: Cisco Unified IP Phone Extension Mobility Weakness

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