Cisco Catalyst Content Switching Module Memory Leak Vulnerability
Secunia Advisory: SA30223
Release Date: 2008-05-15
Popularity: 1,620 views

Critical:
Moderately critical
Impact: DoS
Where: From remote
Solution Status: Vendor Patch

Software:Cisco Catalyst Content Switching Module (CSM) 4.x
Cisco Catalyst Content Switching Module with SSL (CSM-S) 2.x

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CVE reference:CVE-2008-1749


Description:
A vulnerability has been reported in Cisco Catalyst Content Switching Module (CSM) and Cisco Catalyst Content Switching Module with SSL (CSM-S), which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to a memory leak error when processing TCP segments with a specific combination of TCP flags and can be exploited to cause a DoS.

Successful exploitation requires that CSM or CSM-S is configured for layer 7 load balancing.

The vulnerability is reported in the following versions:
* CSM 4.2(3), 4.2(3a), 4.2(4), 4.2(5), 4.2(6), 4.2(7), and 4.2(8)
* CSM-S 2.1(2), 2.1(3), 2.1(4), 2.1(5), 2.1(6), and 2.1(7)

Solution:
Update to CSM version 4.2.9 or CSM-S version 2.1.8.

Cisco CSM 4.2.9:
http://www.cisco.com/pcgi-bin/tablebuild.pl/cat6000-csm?psrtdcat20e2

Cisco CSM 2.1.8:
http://www.cisco.com/pcgi-bin/tablebuild.pl/cat6000-csms?psrtdcat20e2

Provided and/or discovered by:
Reported by the vendor.

Original Advisory:
http://www.cisco.com/warp/public/707/cisco-sa-20080514-csm.shtml


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