RHEL 9 SSH server configuration file must have mode 0600 or less permissive.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-257999	RHEL-09-255115	SV-257999r925984_rule		Medium

Description
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.

STIG	Date
Red Hat Enterprise Linux 9 Security Technical Implementation Guide	2023-12-01

Details

Check Text ( C-61740r925982_chk )
Verify the permissions of the "/etc/ssh/sshd_config" file with the following command: $ ls -al /etc/ssh/sshd_config rw-------. 1 root root 3669 Feb 22 11:34 /etc/ssh/sshd_config If the "/etc/ssh/sshd_config" permissions are not "0600", this is a finding.

Fix Text (F-61664r925983_fix)
Configure the "/etc/ssh/sshd_config" permissions to be "0600" with the following command: $ sudo chmod 0600 /etc/ssh/sshd_config