RHEL 9 SSH server configuration files' permissions must not be modified.

Documentable No

Rule ID SV-257999r1155686_rule

CCI References

CCI-000366

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 must have correct permissions (owner, group owner, mode) to prevent unauthorized changes.

Check Procedure

Verify the permissions of the "/etc/ssh/sshd_config" file with the following command:

$ sudo rpm --verify openssh-server | awk '! ($2 == "c" && $1 ~ /^.\..\.\.\.\..\./) {print $0}'

If the command returns any output, this is a finding.

Fix Action

Run the following commands to restore the correct permissions of OpenSSH server configuration files:

$ sudo rpm --setugids openssh-server
$ sudo rpm --setperms openssh-server