To check how many special characters are required in a password, run the following command:
$ grep pam_cracklib /etc/pam.d/system-auth
The "ocredit" parameter (as a negative number) will indicate how many special characters are required. The DoD requires at least one special character in a password. This would appear as "ocredit=-1". If ocredit is not found or not set to the required value, this is a finding.
Fix Text (F-43518r1_fix)
The pam_cracklib module's "ocredit=" parameter controls requirements for usage of special (or ``other'') characters in a password. When set to a negative number, any password will be required to contain that many special characters. When set to a positive number, pam_cracklib will grant +1 additional length credit for each special character. Add "ocredit=-1" after pam_cracklib.so to require use of a special character in passwords.