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 not permit direct logins to the root account using remote access via SSH.

DISA Rule

SV-282494r1200462_rule

Vulnerability Number

V-282494

Group Title

SRG-OS-000109-GPOS-00056

Rule Version

TOSS-05-000239

Severity

CAT II

CCI(s)

• CCI-004045 - Require users to be individually authenticated before granting access to the shared accounts or resources.

Weight

10

Fix Recommendation

Configure the system to prevent SSH users from logging on directly as "root" by adding or modifying the following line in "/etc/ssh/sshd_config":

PermitRootLogin no

Restart the SSH daemon for the settings to take effect:

$ sudo systemctl restart sshd.service

Check Contents

Verify TOSS 5 remote access using SSH prevents users from logging on directly as "root" using the following command:

$ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*permitrootlogin'

PermitRootLogin no

If the "PermitRootLogin" keyword is set to "yes", is missing, or is commented out, this is a finding.

Vulnerability Number

V-282494

Documentable

False

Rule Version

TOSS-05-000239

Severity Override Guidance

Verify TOSS 5 remote access using SSH prevents users from logging on directly as "root" using the following command:

$ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*permitrootlogin'

PermitRootLogin no

If the "PermitRootLogin" keyword is set to "yes", is missing, or is commented out, this is a finding.

Check Content Reference

M

Target Key

5738