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

The TOSS audit system must protect logon UIDs from unauthorized change.

DISA Rule

SV-252984r958434_rule

Vulnerability Number

V-252984

Group Title

SRG-OS-000057-GPOS-00027

Rule Version

TOSS-04-030190

Severity

CAT II

CCI(s)

• CCI-000162 - Protect audit information from unauthorized access.
• CCI-000163 - Protect audit information from unauthorized modification.
• CCI-000164 - Protect audit information from unauthorized deletion.

Weight

10

Fix Recommendation

Configure the audit system to set the logon UIDs to be immutable by adding the following line to "/etc/audit/rules.d/audit.rules":

--loginuid-immutable

Check Contents

Verify the audit system prevents unauthorized changes to logon UIDs with the following command:

$ sudo grep -i immutable /etc/audit/audit.rules

--loginuid-immutable

If the login UIDs are not set to be immutable by adding the "--loginuid-immutable" option to the "/etc/audit/audit.rules", this is a finding.

Vulnerability Number

V-252984

Documentable

False

Rule Version

TOSS-04-030190

Severity Override Guidance

Verify the audit system prevents unauthorized changes to logon UIDs with the following command:

$ sudo grep -i immutable /etc/audit/audit.rules

--loginuid-immutable

If the login UIDs are not set to be immutable by adding the "--loginuid-immutable" option to the "/etc/audit/audit.rules", this is a finding.

Check Content Reference

M

Target Key

5469