Technical Description

A vulnerability has been identified in Cisco Network Admission Control (NAC), which could be exploited by attackers to gain knowledge of sensitive information and compromise a vulnerable system. This issue is caused by an unspecified error that can allow an attacker to obtain the shared secret used by the Cisco Clean Access Server (CAS) and the Cisco Clean Access Manager (CAM) from error logs that are transmitted over the network, and gain complete control of a vulnerable CAS remotely over the network.

Affected Products

Cisco Network Admission Control (NAC) 3.5.x
Cisco Network Admission Control (NAC) 3.6.x
Cisco Network Admission Control (NAC) 4.0.x
Cisco Network Admission Control (NAC) 4.1.x

Solution

NAC Appliance software version 3.5.x - Contact TAC :
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml

NAC Appliance software version 3.6.x - Upgrade to version 3.6.4.4 :
http://www.cisco.com/public/sw-center/ciscosecure/cleanaccess.shtml

NAC Appliance software version 4.0.x - Upgrade to version 4.0.6 :
http://www.cisco.com/public/sw-center/ciscosecure/cleanaccess.shtml

NAC Appliance software version 4.1.x - Upgrade to version 4.1.2 :
http://www.cisco.com/public/sw-center/ciscosecure/cleanaccess.shtml

References

http://www.vupen.com/english/advisories/2008/1248
http://www.cisco.com/warp/public/707/cisco-sa-20080416-nac.shtml

Credits

Vulnerability reported by the vendor.

ChangeLog

2008-04-17 : Initial release

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