TITLE:
Cisco CallManager Connection Handling Denial of Service

SECUNIA ADVISORY ID:
SA18494

VERIFY ADVISORY:
http://secunia.com/advisories/18494/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From local network

SOFTWARE:
Cisco CallManager 3.x
http://secunia.com/product/2805/
Cisco CallManager 4.x
http://secunia.com/product/5363/

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):
http://www.cisco.com/warp/public/707/cisco-sa-20060118-ccmdos.shtml#software

PROVIDED AND/OR DISCOVERED BY:
Reported by vendor.

ORIGINAL ADVISORY:
http://www.cisco.com/warp/public/707/cisco-sa-20060118-ccmdos.shtml

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