STIG ID: RHEL-09-611035 | SRG: SRG-OS-000021-GPOS-00005 | Severity: medium | CCI: | Vulnerability Id: V-258096
If the pam_faillock.so module is not loaded, the system will not correctly lockout accounts to prevent password guessing attacks.
Configure RHEL 9 to include the use of the pam_faillock.so module in the /etc/pam.d/password-auth file.
Add/modify the appropriate sections of the "/etc/pam.d/password-auth" file to match the following lines:
Note: The "preauth" line must be listed before pam_unix.so.
auth required pam_faillock.so preauth
auth required pam_faillock.so authfail
account required pam_faillock.so
Verify the pam_faillock.so module is present in the "/etc/pam.d/password-auth" file:
$ grep pam_faillock.so /etc/pam.d/password-auth
auth required pam_faillock.so preauth
auth required pam_faillock.so authfail
account required pam_faillock.so
If the pam_faillock.so module is not present in the "/etc/pam.d/password-auth" file with the "preauth" line listed before pam_unix.so, this is a finding.