Technical Description

Two vulnerabilities have been identified in Cisco Unified Communications Manager (CUCM), formerly CallManager, which could be exploited by remote attackers to cause a denial of service or take complete control of an affected system.

The first issue is caused by an off-by-one buffer overflow error in the Certificate Trust List (CTL) Provider service when processing malformed requests (port 2444/TCP), which could be exploited by remote unauthenticated attackers to crash an affected service or execute arbitrary code.

The second vulnerability is caused by a heap overflow error in the Real-Time Information Server (RIS) Data Collector service when processing malformed requests (port 2556/TCP), which could be exploited by remote unauthenticated attackers to crash an affected service or execute arbitrary code.

Affected Products

Cisco Unified CallManager 3.3 versions prior to 3.3(5)SR3
Cisco Unified CallManager 4.1 versions prior to 4.1(3)SR5
Cisco Unified CallManager 4.2 versions prior to 4.2(3)SR2
Cisco Unified Communications Manager 4.3 versions prior to 4.3(1)SR1
Cisco Unified Communications Manager 5.1 versions prior to 5.1(2)

Solution

Apply fixes :
http://www.cisco.com/warp/public/707/cisco-sa-20070711-cucm.shtml#fixes

References

http://www.vupen.com/english/advisories/2007/2512
http://www.cisco.com/warp/public/707/cisco-sa-20070711-cucm.shtml
http://www.iss.net/threats/270.html
http://www.iss.net/threats/271.html

Credits

Vulnerabilities reported by IBM ISS X-Force.

ChangeLog

2007-07-12 : Initial release

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