Install ufw Package

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Description

The ufw package can be installed with the following command:


$ apt-get install ufw

Rationale

ufw controls the Linux kernel network packet filtering code. ufw allows system operators to set up firewalls and IP masquerading, etc.

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 dpkg-query --show --showformat='${db:Status-Status}
' 'kernel' 2>/dev/null | grep -q installed; then

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

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: Gather the package facts
  package_facts:
    manager: auto
  tags:
  - DISA-STIG-UBTU-20-010433
  - enable_strategy
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - package_ufw_installed

- name: Ensure ufw is installed
  package:
    name: ufw
    state: present
  when: '"kernel" in ansible_facts.packages'
  tags:
  - DISA-STIG-UBTU-20-010433
  - enable_strategy
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - package_ufw_installed