RHEL 10 must enforce "root" group ownership of the "/boot/grub2/grub.cfg" file.

STIG ID: RHEL-10-400345  |  SRG: SRG-OS-000080-GPOS-00048 |  Severity: medium (CAT II)  |  CCI: CCI-000213 |  Vulnerability Id: V-281086

Vulnerability Discussion

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

Check

Verify RHEL 10 enforces 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 the "/boot/grub2/grub.cfg" file does not have a group owner of "root", this is a finding.

Fix

Configure RHEL 10 to enforce group ownership of the "/boot/grub2/grub.cfg" file.

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

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