The AIX operating system must be configured to use a valid server_ca.pem file.

To assure accountability and prevent unauthenticated access, privileged and non-privileged users must utilize multifactor authentication to prevent potential misuse and compromise of the system. Multifactor authentication uses two or more factors to achieve authentication.

Factors include: 1. Something you know (e.g., password/PIN); 2. Something you have (e.g., cryptographic identification device, token); and 3. Something you are (e.g., biometric).

The DoW CAC with DoW-approved PKI is an example of multifactor authentication.

Verify the location of the "server_ca.pem" file:

# grep -i "trustedcas" /etc/security/pmfa/pam_pmfa.conf | grep -v '#'

TRUSTEDCAS = /<path_to_file>/server_ca.pem

Verify that the configured "server_ca.pem" file exists in the defined location:

# ls -la /<path_to_file>/server_ca.pem

If the file does not exist, this is a finding.

Configure the system to use a valid "server_ca.pem" file.