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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-215439	AIX7-00-003203	SV-215439r508663_rule		Medium

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.

STIG	Date
IBM AIX 7.x Security Technical Implementation Guide	2023-02-13

Details

Check Text ( C-16637r294768_chk )
Verify /etc/security/pmfa/pam_pmfa.conf is configured correctly. # grep -i "trustedcas" /etc/security/pmfa/pam_pmfa.conf \| grep -v '#' TRUSTEDCAS = //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.

Check Text ( C-16637r294768_chk )

Verify /etc/security/pmfa/pam_pmfa.conf is configured correctly.

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

TRUSTEDCAS = //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 Text (F-16635r294769_fix)
Add or update the following lines in the "/etc/security/pmfa/pam_pmfa.conf" file: TRUSTEDCAS = //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