The Chronyd service is enabled

Documentos > Datadog Security > OOTB Rules > The Chronyd service is enabled

This page is not yet available in Spanish. We are working on its translation.
If you have any questions or feedback about our current translation project, feel free to reach out to us!

Description

chrony is a daemon which implements the Network Time Protocol (NTP) is designed to synchronize system clocks across a variety of systems and use a source that is highly accurate. More information on chrony can be found at

https://chrony-project.org/. Chrony can be configured to be a client and/or a server. To enable Chronyd service, you can run: # systemctl enable chronyd.service This recommendation only applies if chrony is in use on the system.

Rationale

If chrony is in use on the system proper configuration is vital to ensuring time synchronization is working properly.

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

SYSTEMCTL_EXEC='/usr/bin/systemctl'
"$SYSTEMCTL_EXEC" unmask 'chrony.service'
"$SYSTEMCTL_EXEC" start 'chrony.service'
"$SYSTEMCTL_EXEC" enable 'chrony.service'

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:
  - enable_strategy
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - service_chronyd_enabled

- name: The Chronyd service is enabled - Enable service chrony
  block:

  - name: Gather the package facts
    package_facts:
      manager: auto

  - name: The Chronyd service is enabled - Enable Service chrony
    ansible.builtin.systemd:
      name: chrony
      enabled: true
      state: started
      masked: false
    when:
    - '"chrony" in ansible_facts.packages'
  when:
  - ansible_virtualization_type not in ["docker", "lxc", "openvz", "podman", "container"]
  - '"chrony" in ansible_facts.packages'
  tags:
  - enable_strategy
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - service_chronyd_enabled