Title

RHEL 9 SSH server configuration file must have mode 0600 or less permissive. (Cat II impact)

Discussion

Service configuration files enable or disable features of their respective services that if configured incorrectly can lead to insecure and vulnerable configurations. Therefore, service configuration files should be owned by the correct group to prevent unauthorized changes.

Check Content

Verify the permissions of the "/etc/ssh/sshd_config" file with the following command: $ sudo find /etc/ssh/sshd_config /etc/ssh/sshd_config.d -exec stat -c "%a %n" {} \; 600 /etc/ssh/sshd_config 700 /etc/ssh/sshd_config.d 600 /etc/ssh/sshd_config.d/50-cloud-init.conf 600 /etc/ssh/sshd_config.d/50-redhat.conf If the "/etc/ssh/sshd_config" permissions are not "0600", this is a finding.

Fix Text

Configure the "/etc/ssh/sshd_config" permissions to be "0600" with the following command: $ sudo chmod 0600 /etc/ssh/sshd_config

Additional Identifiers

Rule ID: SV-257999r1045061_rule

Vulnerability ID: V-257999

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.