AIX must have the have the PowerSC Multi Factor Authentication Product configured.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-215439	SRG-OS-000480-GPOS-00227	AIX7-00-003203	SV-215439r991589_rule	2024-08-16	3

Description
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.

Description

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.

ℹ️ Check
Verify /etc/security/pmfa/pam_pmfa.conf is configured correctly. # grep -i "trustedcas" /etc/security/pmfa/pam_pmfa.conf \| grep -v '#' TRUSTEDCAS = /<path_to_file>/server_ca.pem Note: Verify with the SA/ISSO as to the location of the "server_ca.pem" file. If "TRUSTEDCAS" is not configured to point to a valid "server_ca.pem" file or is missing, this is a finding. # grep -i "mfa-url" /etc/security/pmfa/pam_pmfa.conf \| grep -v '#' MFA-URL = https://pmfa.example.com:6793/policyAuth/ If the "MFA-URL" is missing or does not point to a valid address, this is a finding. # grep -i "server-version" /etc/security/pmfa/pam_pmfa.conf \| grep -v '#' SERVER-VERSION = 2 If "SERVER-VERSION" is missing or is not set to "2", this is a finding. # grep -i "ctc-prompt" /etc/security/pmfa/pam_pmfa.conf \| grep -v '#' CTC-PROMPT-ONLY = Y If "CTC-PROMPT-ONLY" is missing or is not set to "Y", this is a finding.

ℹ️ Check

Verify /etc/security/pmfa/pam_pmfa.conf is configured correctly. # grep -i "trustedcas" /etc/security/pmfa/pam_pmfa.conf | grep -v '#' TRUSTEDCAS = /<path_to_file>/server_ca.pem Note: Verify with the SA/ISSO as to the location of the "server_ca.pem" file. If "TRUSTEDCAS" is not configured to point to a valid "server_ca.pem" file or is missing, this is a finding. # grep -i "mfa-url" /etc/security/pmfa/pam_pmfa.conf | grep -v '#' MFA-URL = https://pmfa.example.com:6793/policyAuth/ If the "MFA-URL" is missing or does not point to a valid address, this is a finding. # grep -i "server-version" /etc/security/pmfa/pam_pmfa.conf | grep -v '#' SERVER-VERSION = 2 If "SERVER-VERSION" is missing or is not set to "2", this is a finding. # grep -i "ctc-prompt" /etc/security/pmfa/pam_pmfa.conf | grep -v '#' CTC-PROMPT-ONLY = Y If "CTC-PROMPT-ONLY" is missing or is not set to "Y", this is a finding.

✔️ Fix
Add or update the following lines in the "/etc/security/pmfa/pam_pmfa.conf" file: TRUSTEDCAS = /<path_to_file>/server_ca.pem Note: Verify with the SA/ISSO as to the location of the "server_ca.pem" file. MFA-URL = https://pmfa.example.com:6793/policyAuth/ SERVER-VERSION = 2 CTC-PROMPT-ONLY = Y