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.
An XCCDF Rule
Description
<VulnDiscussion>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.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-242575r812732_rule
- Severity
- High
- References
- Updated
Remediation - Manual Procedure
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.