Cisco Secure Access Control Server for Windows (ACS Windows) and Cisco Secure Access Control Server Solution Engine (ACS Solution Engine) 3.3.1, when the EAP-TLS protocol is enabled, does not properly handle expired or untrusted certificates, which allows remote attackers to bypass authentication and gain unauthorized access via a cryptographically correct certificate with valid fields such as the username.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Secure_access_control_server | Cisco | 3.3(1) (including) | 3.3(1) (including) |
| Secure_access_control_server | Cisco | 3.3.1 (including) | 3.3.1 (including) |
| Secure_acs_solution_engine | Cisco | * | * |
References
- http://www.ciac.org/ciac/bulletins/p-028.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20041102-acs-eap-tls.shtml
- http://www.securityfocus.com/bid/11577
- https://exchange.xforce.ibmcloud.com/vulnerabilities/17936
- http://www.ciac.org/ciac/bulletins/p-028.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20041102-acs-eap-tls.shtml
- http://www.securityfocus.com/bid/11577
- https://exchange.xforce.ibmcloud.com/vulnerabilities/17936