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 must use a Linux Security Module configured to enforce limits on system services.

DISA Rule

SV-282510r1201302_rule

Vulnerability Number

V-282510

Group Title

SRG-OS-000134-GPOS-00068

Rule Version

TOSS-05-000023

Severity

CAT II

CCI(s)

• CCI-001084 - Isolate security functions from nonsecurity functions.

Weight

10

Fix Recommendation

Configure the operating system to verify correct operation of all security functions.

Set the "SELinux" status and the "Enforcing" mode by modifying the "/etc/selinux/config" file to have the following line:

SELINUX=enforcing

Restart the system for the changes to take effect.

Check Contents

Note: At lower classification levels (CUI, Secret) where vast amounts of data are processed and a performance impact is occurring, an authorizing official can consider this requirement not applicable.

Confirm that TOSS verifies the correct operation of all security functions.

Determine if "SELinux" is active and in "Enforcing" mode using the following command:

$ sudo getenforce
Enforcing

If "SELinux" is not active or not in "Enforcing" mode, this is a finding.

Vulnerability Number

V-282510

Documentable

False

Rule Version

TOSS-05-000023

Severity Override Guidance

Note: At lower classification levels (CUI, Secret) where vast amounts of data are processed and a performance impact is occurring, an authorizing official can consider this requirement not applicable.

Confirm that TOSS verifies the correct operation of all security functions.

Determine if "SELinux" is active and in "Enforcing" mode using the following command:

$ sudo getenforce
Enforcing

If "SELinux" is not active or not in "Enforcing" mode, this is a finding.

Check Content Reference

M

Target Key

5738