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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-257791	RHEL-09-212030	SV-257791r991589_rule		Medium

Description

The " /boot/grub2/grub.cfg" file stores sensitive system configuration. Protection of this file is critical for system security.

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

Details

Check Text (C-61532r925358_chk)

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

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

root /boot/grub2/grub.cfg

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

Fix Text (F-61456r925359_fix)

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

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