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The RHEL 8 SSH private host key files must have mode 0640 or less permissive.

An XCCDF Rule

Description

If an unauthorized user obtains the private SSH host key file, the host could be impersonated.

ID
SV-230287r1017098_rule
Version
RHEL-08-010490
Severity
Medium
References
Updated

Remediation Templates

A Manual Procedure

Configure the mode of SSH private host key files under "/etc/ssh" to "0640" with the following command:

     $ sudo chmod 0640 /etc/ssh/ssh_host*key

The SSH daemon must be restarted for the changes to take effect. To restart the SSH daemon, run the following command:

     $ sudo systemctl restart sshd.service