Title

The TOSS pam_unix.so module must be configured in the password-auth file to use a FIPS 140-2-approved cryptographic hashing algorithm for system authentication. (Cat II impact)

Discussion

Unapproved mechanisms that are used for authentication to the cryptographic module are not verified and therefore cannot be relied upon to provide confidentiality or integrity, and DoD data may be compromised. TOSS systems utilizing encryption are required to use FIPS-compliant mechanisms for authenticating to cryptographic modules. FIPS 140-2 is the current standard for validating that mechanisms used to access cryptographic modules utilize authentication that meets DoD requirements. This allows for Security Levels 1, 2, 3, or 4 for use on a general-purpose computing system.

Check Content

Verify that the pam_unix.so module is configured to use sha512. Check that the pam_unix.so module is configured to use sha512 in /etc/pam.d/password-auth with the following command: $ sudo grep password /etc/pam.d/password-auth | grep pam_unix password sufficient pam_unix.so sha512 If "sha512" is missing, or is commented out, this is a finding.

Fix Text

Configure TOSS to use a FIPS 140-2-approved cryptographic hashing algorithm for system authentication. Edit and/or modify the following line in the "/etc/pam.d/password-auth" file to include the sha512 option for pam_unix.so: password sufficient pam_unix.so sha512

Additional Identifiers

Rule ID: SV-252917r971535_rule

Vulnerability ID: V-252917

Group Title: SRG-OS-000120-GPOS-00061

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.