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For TLS connections, Forescout must automatically terminate the session when a client certificate is requested and the client does not have a suitable certificate. This is required for compliance with C2C Step 1.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-233331FORE-NC-000260SV-233331r856515_ruleCCI-002361medium
Description
In accordance with NIST SP 800-52, the TLS server must terminate the connection with a fatal “handshake failure” alert when a client certificate is requested and the client does not have a suitable certificate. During the TLS handshake negotiation, a "client certificate request" that includes a list of the types of certificates supported and the Distinguished Names of acceptable Certification Authorities (CAs) is sent to the client. TLS handshake enables the SSL or TLS client and server to establish the secret keys with which they communicate.
STIGDate
Forescout Network Access Control Security Technical Implementation Guide2025-06-12

Related Frameworks

1 mapping across 5 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (6) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

IAC-01.2Authenticate, Authorize and Audit (AAA)
1.00
IAC-02Identification & Authentication for Organizational Users
1.00
IAC-03Identification & Authentication for Non-Organizational Users
1.00
IAC-04Identification & Authentication for Devices
1.00
IAC-05Identification & Authentication for Third-Party Technology Assets, Applications and/or Services (TAAS)
1.00
IAC-25Session Termination
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (30) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-10Concurrent Session Control
1.00
AC-11Device Lock
1.00
AC-11(1)Pattern-hiding Displays
1.00
AC-12Session Termination
1.00
AC-12(1)User-initiated Logouts
1.00
AC-2(1)Automated System Account Management
1.00
AC-2(11)Usage Conditions
1.00
AC-2(2)Automated Temporary and Emergency Account Management
1.00
AC-2(3)Disable Accounts
1.00
AC-2(4)Automated Audit Actions
1.00

+20 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.1.11
1.00
CCI1 mapping
CCI-002361
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

PR.AA-03
1.00

Who does this work

7 NICE work roles and 5 EC-Council certifications.

This is an inference across published mappings, not a single claim by anyone. This check maps to a control, which maps to a Cybersecurity Framework outcome, which NIST assigns to the work roles below. EC-Council separately maps its certifications to those same roles.

A certification prepares someone for a role. It is not evidence that a holder is qualified, and neither NIST nor EC-Council has stated that any certification here addresses this check.

Work-role assignments published by NIST (NICE Framework Components 2.2.0 and the CSF 2.0 OLIR crosswalk). Certification mappings published by EC-Council.

Details

Check Text (C-233331r856515_chk)

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 automatically terminate the session when the client does not have a suitable certificate, this is a finding.

Fix Text (F-36491r803479_fix)

Use the Forescout Administrator UI to configure the certificate options to require the Re-verify TLS Sessions is set to every 1 day, or in accordance with the SSP. 1. Log on to the Forescout UI. 2. Select Tools >> Options >> Certificates. 3. Check that in the Ongoing TLS Sessions section, view the Re-verify TLS Sessions. 4. Change the Re-verify TLS Sessions to Every 1 Day or in accordance with the site's SSP, then click "Apply". 5. Next, select the HPS Inspection Engine >> SecureConnector. 6. In the Client-Server Connection, ensure the Minimum Supported TLS Version is set to TLS version 1.2.