The macOS system must be configured to block access to users who are no longer authorized (i.e., users with revoked certificates). To prevent the use of untrusted certificates, the certificates on a smart card must meet the following criteria: its issuer has a system-trusted certificate, the certificate is not expired, its "valid-after" date is in the past, and it passes Certificate Revocation List (CRL) and Online Certificate Status Protocol (OCSP) checking. By setting the smart card certificate trust level to moderate, the system will execute a soft revocation, i.e., if the OCSP/CRL server is unreachable, authentication will still succeed. Audit: Verify the macOS system is configured to check the revocation status of user certificates with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.security.smartcard')\ .objectForKey('checkCertificateTrust').js EOS If the result is not "2", this is a finding. Remediation: Configure the macOS system to check the revocation status of user certificates by installing the "com.apple.security.smartcard" configuration profile with 'checkCertificateTrust' key set to 2

[Smart card certificate trust is not required/Smart card certificate and chain must be trusted/Certificate and chain must be trusted and not receive a revoked status/Certificate and chain must be trusted and revocation status is returned valid]

Remediation: Configure the macOS system to check the revocation status of user certificates by installing the "com.apple.security.smartcard" configuration profile with 'checkCertificateTrust' key set to 2