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 implement DOD or other applicable U.S. Government agency-approved encryption ciphers to protect the confidentiality of SSH client connections.

DISA Rule

SV-282523r1200549_rule

Vulnerability Number

V-282523

Group Title

SRG-OS-000250-GPOS-00093

Rule Version

TOSS-05-000242

Severity

CAT II

CCI(s)

• CCI-001453 - Implement cryptographic mechanisms to protect the integrity of remote access sessions.

Weight

10

Fix Recommendation

Configure the TOSS 5 SSH daemon to use systemwide crypto policies using the following command:

$ sudo dnf reinstall openssh-clients

Check Contents

Verify systemwide crypto policies are in effect using the following command:

$ sudo grep Include /etc/ssh/sshd_config /etc/ssh/sshd_config.d/*

/etc/ssh/sshd_config:Include /etc/ssh/sshd_config.d/*.conf
/etc/ssh/sshd_config.d/50-redhat.conf:Include /etc/crypto-policies/back-ends/opensshserver.config

If "Include /etc/ssh/sshd_config.d/*.conf" or "Include /etc/crypto-policies/back-ends/opensshserver.config" are not included in the system sshd config or the file "/etc/ssh/sshd_config.d/50-redhat.conf" is missing, this is a finding.

Vulnerability Number

V-282523

Documentable

False

Rule Version

TOSS-05-000242

Severity Override Guidance

Verify systemwide crypto policies are in effect using the following command:

$ sudo grep Include /etc/ssh/sshd_config /etc/ssh/sshd_config.d/*

/etc/ssh/sshd_config:Include /etc/ssh/sshd_config.d/*.conf
/etc/ssh/sshd_config.d/50-redhat.conf:Include /etc/crypto-policies/back-ends/opensshserver.config

If "Include /etc/ssh/sshd_config.d/*.conf" or "Include /etc/crypto-policies/back-ends/opensshserver.config" are not included in the system sshd config or the file "/etc/ssh/sshd_config.d/50-redhat.conf" is missing, this is a finding.

Check Content Reference

M

Target Key

5738