Title

The AIX operating system must be configured to use Multi Factor Authentication for remote connections. (Cat II impact)

Discussion

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

Check Content

Verify SSH is configured to use multi factor authentication: # grep ^sshd /etc/pam.conf | head -3 sshd auth required pam_ckfile sshd auth required pam_permission file=/etc/security/access.conf found=allow sshd auth required pam_pmfa /etc/security/pmfa/pam_pmfa.conf If the output does not match the above lines, any lines are missing, or commented out, this is a finding.

Fix Text

Add or update the following lines in the /etc/pam.conf file: sshd auth required pam_ckfile sshd auth required pam_permission file=/etc/security/access.conffound=allow sshd auth required pam_pmfa /etc/security/pmfa/pam_pmfa.conf

Additional Identifiers

Rule ID: SV-215438r991589_rule

Vulnerability ID: V-215438

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.