The macOS system must enforce multifactor authentication for login.

The system must be configured to enforce multifactor authentication.

All users must go through multifactor authentication to prevent unauthenticated access and potential compromise to the system.

IMPORTANT: Modification of Pluggable Authentication Modules (PAM) now requires user authorization or use of a Privacy Preferences Policy Control (PPPC) profile from MDM that authorizes modifying system administrator files or full disk access.

NOTE: /etc/pam.d/login will be automatically modified to its original state following any update or major upgrade to the operating system.

Satisfies: SRG-OS-000105-GPOS-00052, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000108-GPOS-00055, SRG-OS-000112-GPOS-00057, SRG-OS-000705-GPOS-00150

Verify the macOS system is configured to enforce multifactor authentication for login with the following command:

/usr/bin/grep -Ec '^(auth\s+sufficient\s+pam_smartcard.so|auth\s+required\s+pam_deny.so)' /etc/pam.d/login

If the result is not "2", this is a finding.

Configure the macOS system to enforce multifactor authentication for login with the following commands:

/bin/cat > /etc/pam.d/login << LOGIN_END # login: auth account password session auth sufficient pam_smartcard.so auth optional pam_krb5.so use_kcminit auth optional pam_ntlm.so try_first_pass auth optional pam_mount.so try_first_pass auth required pam_opendirectory.so try_first_pass auth required pam_deny.so account required pam_nologin.so account required pam_opendirectory.so password required pam_opendirectory.so session required pam_launchd.so session required pam_uwtmp.so session optional pam_mount.so LOGIN_END

/bin/chmod 644 /etc/pam.d/login /usr/sbin/chown root:wheel /etc/pam.d/login