Title

Forescout must use TLS 1.2, at a minimum, to protect the confidentiality of information passed between the endpoint agent and Forescout for the purposes of client posture assessment. This is required for compliance with C2C Step 1. (Cat II impact)

Discussion

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 Forescout is configured to a list of DoD-approved certificate types and CAs. Verify the TLS session is configured to automatically terminate any session if the client does not have a suitable certificate. For TLS connections, if Forescout is not configured to use TLS 1.2 at a minimum, this is a finding.

Fix Text

Configure the SecureConnector to ensure the minimum supported TLS version is set to TLS 1.2. Log on to the Forescout UI. 1. Select Tools >> Options >> Certificates. 2. Check the Ongoing TLS Sessions section, view the Re-verify TLS Sessions. 3. Change the Re-verify TLS Sessions to Every 1 Day or in accordance with the site's SSP, then click "Apply". 4. Next, select the HPS Inspection Engine >> SecureConnector. 5. In the Client-Server Connection, ensure the Minimum Supported TLS Version is set to TLS version 1.2.

Additional Identifiers

Rule ID: SV-233332r811414_rule

Vulnerability ID: V-233332

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.