Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide

The Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide (V1 R2) has 391 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V1 · R2

CurrentPublished Wed Sep 30 2026

The TOSS 5 SSH server configuration file must have mode 0600 or less permissive.

Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide

Assessment Title

Rule Text

The TOSS 5 SSH server configuration file must have mode 0600 or less permissive.

Description

Discussion Text

Service configuration files enable or disable features of their respective services that if configured incorrectly can lead to insecure and vulnerable configurations. Therefore, service configuration files should be owned by the correct group to prevent unauthorized changes.

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-282708

Rule

SV-282708r1201104_rule

Severity

medium

Rule Version

TOSS-05-000252

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify the permissions of the "/etc/ssh/sshd_config" file using the following command:

$ ls -al /etc/ssh/sshd_config

rw-------. 1 root root 3669 Feb 22 11:34 /etc/ssh/sshd_config

If the "/etc/ssh/sshd_config" permissions are not "0600", this is a finding.

Implementation Procedure

Fix Text

Configure the "/etc/ssh/sshd_config" permissions to be "0600" using the following command:

$ sudo chmod 0600 /etc/ssh/sshd_config

STIG check 334 of 391 in the Tri-Lab Operating System Stack (TOSS) 5 STIG checklist

← Previous · V-282707The TOSS 5 SSH server configuration file must be owned by root.Next · V-282709 →TOSS 5 SSH private host key files must have mode 0640 or less permissive.