RHEL 9 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-258000r1045063_rule
- Version
- RHEL-09-255120
- 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
Restart the SSH daemon for the changes to take effect:
$ sudo systemctl restart sshd.service