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Cisco CallManager Connection Handling Denial of Service

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Release Date:  2006-01-19    Last Update:  2006-01-25    Views:  10,273

Secunia Advisory SA18494

Where:

From local network

Impact:

DoS

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Some vulnerabilities has been reported in Cisco CallManager, which can be exploited by malicious people to cause a DoS (Denial of Service).

1) TCP connections to port 2000 are not timed out aggressively enough, which can be exploited via multiple open connections to consume a large amount of memory and CPU resources.

2) An error in the processing of connections to ports 2001, 2002, and 7727 can be exploited to fill up the Windows message queue by establishing multiple connections. This further leads to the Cisco CallManager restarting after a 30 second timeout.

The following versions are affected:
* Cisco CallManager 3.2 and earlier
* Cisco CallManager 3.3, versions earlier than 3.3(5)SR1a
* Cisco CallManager 4.0, versions earlier than 4.0(2a)SR2c
* Cisco CallManager 4.1, versions earlier than 4.1(3)SR2


Solution:
Fixes are available (see patch matrix):

Further details available to Secunia VIM customers

Provided and/or discovered by:
Reported by vendor.

Original Advisory:
http://www.cisco.com/warp/public/707/cisco-sa-20060118-ccmdos.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 CallManager Connection Handling Denial of Service

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