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Moderately critical

Cisco IP Phone 7940/7960 SIP INVITE Denial of Service Vulnerability

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Release Date:  2007-03-20    Last Update:  2007-03-26    Views:  16,685

Secunia Advisory SA24600

Where:

From remote

Impact:

DoS

Solution Status:

Vendor Patch

CVE Reference(s):

Description


A vulnerability has been reported in Cisco IP Phone 7940 and 7960, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error within the handling of certain SIP INVITE messages. This can be exploited to reboot the device by sending a specially crafted INVITE message with a malformed "sipURI" field of the Remote-Party-ID.

The vulnerability is reported in devices running firmware POS3-07-4-00.


Solution:
Update to firmware version 8.6(0) (POS8-6-0).

Further details available to Secunia VIM customers

Provided and/or discovered by:
Humberto J. Abdelnur, Radu State, and Olivier Festor

Original Advisory:
Cisco:
http://www.cisco.com/en/US/products/products_security_response09186a00808075ad.html

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 IP Phone 7940/7960 SIP INVITE Denial of Service Vulnerability

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