---
title: All GRUB configuration files must have mode 0600 or more restrictive
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: >-
  Docs > Datadog Security > OOTB Rules > All GRUB configuration files must have
  mode 0600 or more restrictive
---

# All GRUB configuration files must have mode 0600 or more restrictive
 
## Description{% #description %}

The files in `/boot/grub2` should have mode `0600` to prevent destruction or modification of the file. To properly set the permissions of `/boot/grub2`, run the command:

```
$ sudo chmod 0600 /boot/grub2
```

## Rationale{% #rationale %}

The file mode 0600 prevents unauthorized access and modifications to boot settings.

## Remediation{% #remediation %}

### Shell script{% #shell-script %}

The following script can be run on the host to remediate the issue.

```bash
#!/bin/bash

# Remediation is applicable only in certain platforms
if ( rpm --quiet -q grub2-common && rpm --quiet -q kernel-core ); then

find -P /boot/grub2/ -maxdepth 1 -perm /u+xs,g+xwrs,o+xwrt  -type f -regextype posix-extended -regex '^.*$' -exec chmod u-xs,g-xwrs,o-xwrt {} \;

else
    >&2 echo 'Remediation is not applicable, nothing was done'
fi
```

### Ansible playbook{% #ansible-playbook %}

The following playbook can be run with Ansible to remediate the issue.

```go
- name: Gather the package facts
  package_facts:
    manager: auto
  tags:
  - CCE-90556-2
  - configure_strategy
  - file_permissions_boot_grub2
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Find /boot/grub2/ file(s)
  ansible.builtin.command: find -P /boot/grub2/ -maxdepth 1 -perm /u+xs,g+xwrs,o+xwrt  -type
    f -regextype posix-extended -regex "^.*$"
  register: files_found
  changed_when: false
  failed_when: false
  check_mode: false
  when: ( "grub2-common" in ansible_facts.packages and "kernel-core" in ansible_facts.packages
    )
  tags:
  - CCE-90556-2
  - configure_strategy
  - file_permissions_boot_grub2
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Set permissions for /boot/grub2/ file(s)
  ansible.builtin.file:
    path: '{{ item }}'
    mode: u-xs,g-xwrs,o-xwrt
    state: file
  with_items:
  - '{{ files_found.stdout_lines }}'
  when: ( "grub2-common" in ansible_facts.packages and "kernel-core" in ansible_facts.packages
    )
  tags:
  - CCE-90556-2
  - configure_strategy
  - file_permissions_boot_grub2
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
```