Cis Ubuntu1404 V210 1 6 2 1

---
name: "CIS Ubuntu 14.04 LTS - 1.6.2.1 Ensure AppArmor is not disabled in bootloader configuration"
description: "Verify that AppArmor is not disabled via GRUB bootloader parameters"
category: "cis-os-hardening"
version: "2.1.0"
author: "cyberstrike-official"
tags:
  - cis
  - ubuntu
  - ubuntu-14.04
  - level-2
  - scored
  - mac
cis_id: "1.6.2.1"
cis_benchmark: "CIS Ubuntu Linux 14.04 LTS Benchmark v2.1.0"
tech_stack:
  - ubuntu
  - linux
cwe_ids: []
chains_with:
  - cis-ubuntu1404-v210-1-6-2-2
prerequisites: []
severity_boost: "high"
---

# 1.6.2.1 Ensure AppArmor is not disabled in bootloader configuration (Scored)

## Profile Applicability

- Level 2 - Server
- Level 2 - Workstation

## Description

Configure AppArmor to be enabled at boot time and verify that it has not been overwritten by the bootloader boot parameters.

## Rationale

AppArmor must be enabled at boot time in your bootloader configuration to ensure that the controls it provides are not overridden.

## Audit Procedure

Run the following command and verify that no linux line the `apparmor=0` parameter set:

```bash
grep "^\s*linux" /boot/grub/grub.cfg
```

## Expected Result

No linux lines should contain `apparmor=0`.

## Remediation

Edit `/etc/default/grub` and remove all instances of `apparmor=0` from all CMDLINE_LINUX parameters:

```
GRUB_CMDLINE_LINUX_DEFAULT="quiet"
GRUB_CMDLINE_LINUX=""
```

Run the following command to update the grub2 configuration:

```bash
update-grub
```

## Default Value

AppArmor is enabled by default on Ubuntu systems.

## Notes

This recommendation is designed around the grub bootloader, if LILO or another bootloader is in use in your environment enact equivalent settings.

## References

1. AppArmor Documentation: http://wiki.apparmor.net/index.php/Documentation
2. Ubuntu AppArmor Documentation: https://help.ubuntu.com/community/AppArmor
3. SUSE AppArmor Documentation: https://www.suse.com/documentation/apparmor/

## Profile

- Level 2 - Server
- Level 2 - Workstation