RHEL 9 /boot/grub2/grub.cfg file must be group-owned by root.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-257790	RHEL-09-212025	SV-257790r991589_rule		Medium

Description

The "root" group is a highly privileged group. Furthermore, the group-owner of this file should not have any access privileges anyway.

STIG	Date
Red Hat Enterprise Linux 9 Security Technical Implementation Guide	2024-12-04

Details

Check Text (C-61531r925355_chk)

Verify the group ownership of the "/boot/grub2/grub.cfg" file with the following command:

$ sudo stat -c "%G %n" /boot/grub2/grub.cfg

root /boot/grub2/grub.cfg

If "/boot/grub2/grub.cfg" file does not have a group owner of "root", this is a finding.

Fix Text (F-61455r925356_fix)

Change the group of the file /boot/grub2/grub.cfg to root by running the following command:

$ sudo chgrp root /boot/grub2/grub.cfg