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

TOSS must ensure the SSH server uses strong entropy.

DISA Rule

SV-253116r991589_rule

Vulnerability Number

V-253116

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

TOSS-04-040750

Severity

CAT III

CCI(s)

Weight

10

Fix Recommendation

Configure the operating system SSH server to use strong entropy.

Add or modify the following line in the "/etc/sysconfig/sshd" file.

SSH_USE_STRONG_RNG=32

The SSH service must be restarted for changes to take effect.

Check Contents

Verify the operating system SSH server uses strong entropy with the following command:

$ sudo grep -i ssh_use_strong_rng /etc/sysconfig/sshd
SSH_USE_STRONG_RNG=32

If the "SSH_USE_STRONG_RNG" line does not equal "32", is commented out or missing, this is a finding.

Vulnerability Number

V-253116

Documentable

False

Rule Version

TOSS-04-040750

Severity Override Guidance

Verify the operating system SSH server uses strong entropy with the following command:

$ sudo grep -i ssh_use_strong_rng /etc/sysconfig/sshd
SSH_USE_STRONG_RNG=32

If the "SSH_USE_STRONG_RNG" line does not equal "32", is commented out or missing, this is a finding.

Check Content Reference

M

Target Key

5469