CVE-2004-1099
HighSummary
The vulnerability in Cisco Secure Access Control Server for Windows and Solution Engine version 3.3.1, when EAP-TLS protocol is enabled, improperly handles expired or untrusted certificates. This allows a remote attacker to bypass authentication and gain unauthorized access using a cryptographically correct certificate with valid fields such as the username.
Risk Assessment
The risk involves the possibility of unauthorized access to the system by an attacker who can impersonate a legitimate user, potentially leading to confidentiality and integrity breaches.
Recommendation
It is recommended to upgrade the Cisco Secure ACS software to a version that includes a fix for this vulnerability and to verify the EAP-TLS configuration to ensure proper certificate validation.
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Original NVD description (English source)
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.