The Cisco Network Admission Control (NAC) 3.6.4.1 and earlier allows remote attackers to prevent installation of the Cisco Clean Access (CCA) Agent and bypass local and remote protection mechanisms by modifying (1) the HTTP User-Agent header or (2) the behavior of the TCP/IP stack. NOTE: the vendor has disputed the severity of this issue, stating that users cannot bypass authentication mechanisms.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Network_admission_control | Cisco | * | 3.6.4.1 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.3 (including) | 3.3 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.3.1 (including) | 3.3.1 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.3.2 (including) | 3.3.2 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.3.3 (including) | 3.3.3 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.3.4 (including) | 3.3.4 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.3.5 (including) | 3.3.5 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.3.6 (including) | 3.3.6 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.3.7 (including) | 3.3.7 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.3.8 (including) | 3.3.8 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.3.9 (including) | 3.3.9 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.4 (including) | 3.4 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.4.1 (including) | 3.4.1 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.4.2 (including) | 3.4.2 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.4.3 (including) | 3.4.3 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.4.4 (including) | 3.4.4 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.4.5 (including) | 3.4.5 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.5 (including) | 3.5 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.5(9) (including) | 3.5(9) (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.5.1 (including) | 3.5.1 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.5.2 (including) | 3.5.2 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.5.3 (including) | 3.5.3 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.5.4 (including) | 3.5.4 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.5.5 (including) | 3.5.5 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.6.0.1 (including) | 3.6.0.1 (including) |
| Network_admission_control_manager_and_server_system_software | Cisco | 3.6.4.0.1 (including) | 3.6.4.0.1 (including) |
References
- http://archive.cert.uni-stuttgart.de/archive/bugtraq/2005/08/msg00200.html
- http://www.cisco.com/en/US/products/ps6128/products_security_notice09186a00804fa82b.html
- http://www.cisco.com/en/US/products/ps6128/tsd_products_security_response09186a008071d609.html
- http://www.securityfocus.com/archive/1/408603/30/0/threaded
- http://www.securityfocus.com/archive/1/444424/100/0/threaded
- http://www.securityfocus.com/archive/1/444501/100/0/threaded
- http://www.securityfocus.com/archive/1/444737/100/0/threaded
- http://www.securityfocus.com/bid/19726
- http://archive.cert.uni-stuttgart.de/archive/bugtraq/2005/08/msg00200.html
- http://www.cisco.com/en/US/products/ps6128/products_security_notice09186a00804fa82b.html
- http://www.cisco.com/en/US/products/ps6128/tsd_products_security_response09186a008071d609.html
- http://www.securityfocus.com/archive/1/408603/30/0/threaded
- http://www.securityfocus.com/archive/1/444424/100/0/threaded
- http://www.securityfocus.com/archive/1/444501/100/0/threaded
- http://www.securityfocus.com/archive/1/444737/100/0/threaded
- http://www.securityfocus.com/bid/19726