Title

The Cisco ISE must use TLS 1.2, at a minimum, to protect the confidentiality of information passed between the endpoint agent and the Cisco ISE. This is This is required for compliance with C2C Step 1. (Cat I impact)

Discussion

The agent may pass information about the endpoint to the Cisco ISE, which may be sensitive. Using older unauthorized versions or incorrectly configuring protocol negotiation makes the gateway vulnerable to known and unknown attacks that exploit vulnerabilities in this protocol.

Check Content

If DoD is not at C2C Step 1 or higher, this is not a finding. Verify that only TLS 1.2 is enabled. From the Web Admin portal: 1. Navigate to Administration >> System >> Settings >> Security Settings. 2. Ensure "Allow TLS1.0", "Allow TLS1.1", and "Allow legacy unsafe TLS renegotiation for ISE as a client" are unchecked. If TLS 1.0 or 1.1 is enabled, this is a finding.

Fix Text

Configure ISE so that only TLS 1.2 is enabled: From the Web Admin portal: 1. Navigate to Administration >> System >> Settings >> Security Settings. 2. Ensure "Allow TLS1.0", "Allow TLS1.1", and "Allow legacy unsafe TLS renegotiation for ISE as a client" are unchecked.

Additional Identifiers

Rule ID: SV-242575r812732_rule

Vulnerability ID: V-242575

Group Title: SRG-NET-000062-NAC-000340

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.