Ensure AppArmor is installed

Description

AppArmor provide Mandatory Access Controls.

Rationale

Without a Mandatory Access Control system installed only the default Discretionary Access Control system will be available.

Remediation

Shell script

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

#!/bin/bash

# Remediation is applicable only in certain platforms
if [ ! -f /.dockerenv ] && [ ! -f /run/.containerenv ]; then

DEBIAN_FRONTEND=noninteractive apt-get install -y "apparmor"

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

Ansible playbook

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

- name: Ensure apparmor is installed
  package:
    name: apparmor
    state: present
  when: ansible_virtualization_type not in ["docker", "lxc", "openvz", "podman", "container"]
  tags:
  - DISA-STIG-UBTU-20-010439
  - enable_strategy
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - package_apparmor_installed