STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 4 Security Technical Implementation Guide Version: 2 Release: 6 Benchmark Date: 01 Jul 2026:

TOSS must not allow blank or null passwords in the system-auth file.

DISA Rule

SV-252940r991589_rule

Vulnerability Number

V-252940

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

TOSS-04-010380

Severity

CAT I

CCI(s)

CCI-000366 - Implement the security configuration settings.

Weight

Fix Recommendation

Remove any instances of the "nullok" option in the "/etc/pam.d/system-auth" file to prevent logons with empty passwords.

Note: Manual changes to the listed file may be overwritten by the "authselect" program.

Check Contents

To verify that null passwords cannot be used, run the following command:

$ sudo grep -i nullok /etc/pam.d/system-auth

If output is produced, this is a finding.

Vulnerability Number

V-252940

Documentable

False

Rule Version

TOSS-04-010380

Severity Override Guidance

To verify that null passwords cannot be used, run the following command:

$ sudo grep -i nullok /etc/pam.d/system-auth

If output is produced, this is a finding.

Check Content Reference

Target Key

5469