Skip to content

The TOSS SSH private host key files must have mode 0600 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-253107r991589_rule
Version
TOSS-04-040660
Severity
Medium
References
Updated

Remediation Templates

A Manual Procedure

Configure the mode of SSH private host key files under "/etc/ssh" to "0600" with the following command:

$ sudo chmod 0600 /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