CVE-2006-4430

Cisco Network Admission Control < 3.6.4.1 - Unauthenticated Protection Mechanism Bypass via HTTP User-Agent Header

Title source: llm

Description

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.

References (8)

Core 8

Core References

Various Sources mailing-list x_refsource_bugtraq

http://archive.cert.uni-stuttgart.de/archive/bugtraq/2005/08/msg00200.html

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/19726

Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq

http://www.securityfocus.com/archive/1/444737/100/0/threaded

Vendor Advisory vendor-advisory x_refsource_cisco

http://www.cisco.com/en/US/products/ps6128/products_security_notice09186a00804fa82b.html

Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq

http://www.securityfocus.com/archive/1/408603/30/0/threaded

Vendor Advisory vendor-advisory x_refsource_cisco

http://www.cisco.com/en/US/products/ps6128/tsd_products_security_response09186a008071d609.html

Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq

http://www.securityfocus.com/archive/1/444501/100/0/threaded

Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq

http://www.securityfocus.com/archive/1/444424/100/0/threaded

Scores

EPSS 0.0191

EPSS Percentile 77.6%

Details

Status published

Products (26)

cisco/network_admission_control < 3.6.4.1

cisco/network_admission_control_manager_and_server_system_software 3.3

cisco/network_admission_control_manager_and_server_system_software 3.3.1

cisco/network_admission_control_manager_and_server_system_software 3.3.2

cisco/network_admission_control_manager_and_server_system_software 3.3.3

cisco/network_admission_control_manager_and_server_system_software 3.3.4

cisco/network_admission_control_manager_and_server_system_software 3.3.5

cisco/network_admission_control_manager_and_server_system_software 3.3.6

cisco/network_admission_control_manager_and_server_system_software 3.3.7

cisco/network_admission_control_manager_and_server_system_software 3.3.8

... and 16 more

Published Aug 29, 2006

Tracked Since Feb 18, 2026