STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 26 Mar 2026:

TOSS 5 audit system must protect login user identifiers (UIDs) from unauthorized change.

DISA Rule

SV-282434r1200282_rule

Vulnerability Number

V-282434

Group Title

SRG-OS-000057-GPOS-00027

Rule Version

TOSS-05-000463

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.
• CCI-000172 - Generate audit records for the event types defined in AU-2 c that include the audit record content defined in AU-3.

Weight

10

Fix Recommendation

Configure TOSS 5 auditing to prevent modification of login UIDs once they are set by adding the following line to "/etc/audit/rules.d/audit.rules":

--loginuid-immutable

Restart the audit daemon for the changes to take effect.

Check Contents

Verify the audit system prevents unauthorized changes to login UIDs using the following command:

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

--loginuid-immutable

If the "--loginuid-immutable" option is not returned in the "/etc/audit/audit.rules", or the line is commented out, this is a finding.

Vulnerability Number

V-282434

Documentable

False

Rule Version

TOSS-05-000463

Severity Override Guidance

Verify the audit system prevents unauthorized changes to login UIDs using the following command:

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

--loginuid-immutable

If the "--loginuid-immutable" option is not returned in the "/etc/audit/audit.rules", or the line is commented out, this is a finding.

Check Content Reference

M

Target Key

5738