RHEL 8, for certificate-based authentication, must enforce authorized access to the corresponding private key. (Cat II impact)
If an unauthorized user obtains access to a private key without a passcode, that user would have unauthorized access to any system where the associated public key has been installed.
Verify the SSH private key files have a passcode. For each private key stored on the system, use the following command: $ sudo ssh-keygen -y -f /path/to/file If the contents of the key are displayed, this is a finding.
Create a new private and public key pair that utilizes a passcode with the following command: $ sudo ssh-keygen -n [passphrase]
The information system, for PKI-based authentication, enforces authorized access to the corresponding private key.