Disable Software RAID Monitor (mdmonitor)

An XCCDF Rule

Description

The mdmonitor service is used for monitoring a software RAID array; hardware RAID setups do not use this service. The mdmonitor service can be disabled with the following command:

$ sudo systemctl mask --now mdmonitor.service

Rationale

If software RAID monitoring is not required, there is no need to run this service.

ID: xccdf_org.ssgproject.content_rule_service_mdmonitor_disabled
Severity: Low
References: 11 14 3 9

BAI10.01 BAI10.02 BAI10.03 BAI10.05 DSS05.02 DSS05.05 DSS06.06

4.3.3.5.1 4.3.3.5.2 4.3.3.5.3 4.3.3.5.4 4.3.3.5.5 4.3.3.5.6 4.3.3.5.7 4.3.3.5.8 4.3.3.6.1 4.3.3.6.2 4.3.3.6.3 4.3.3.6.4 4.3.3.6.5 4.3.3.6.6 4.3.3.6.7 4.3.3.6.8 4.3.3.6.9 4.3.3.7.1 4.3.3.7.2 4.3.3.7.3 4.3.3.7.4 4.3.4.3.2 4.3.4.3.3

SR 1.1 SR 1.10 SR 1.11 SR 1.12 SR 1.13 SR 1.2 SR 1.3 SR 1.4 SR 1.5 SR 1.6 SR 1.7 SR 1.8 SR 1.9 SR 2.1 SR 2.2 SR 2.3 SR 2.4 SR 2.5 SR 2.6 SR 2.7 SR 7.6

A.12.1.2 A.12.5.1 A.12.6.2 A.14.2.2 A.14.2.3 A.14.2.4 A.9.1.2

CM-6(a) CM-7(a) CM-7(b)

PR.IP-1 PR.PT-3
Updated: 5 days ago


[customizations.services]
masked = ["mdmonitor"]

apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
spec:
  config:
    ignition:
      version: 3.1.0    systemd:
      units:
      - name: mdmonitor.service
        enabled: false
        mask: true
      - name: mdmonitor.socket
        enabled: false
        mask: true

include disable_mdmonitor

class disable_mdmonitor {
  service {'mdmonitor':
    enable => false,
    ensure => 'stopped',  }
}


service disable mdmonitor

- name: Gather the package facts
  package_facts:
    manager: auto
  tags:
  - NIST-800-53-CM-6(a)
  - NIST-800-53-CM-7(a)  - NIST-800-53-CM-7(b)
  - disable_strategy
  - low_complexity
  - low_disruption
  - low_severity
  - no_reboot_needed
  - service_mdmonitor_disabled

- name: Disable Software RAID Monitor (mdmonitor) - Collect systemd Services Present
    in the System
  ansible.builtin.command: systemctl -q list-unit-files --type service
  register: service_exists
  changed_when: false
  failed_when: service_exists.rc not in [0, 1]
  check_mode: false
  when: '"kernel" in ansible_facts.packages'
  tags:
  - NIST-800-53-CM-6(a)
  - NIST-800-53-CM-7(a)
  - NIST-800-53-CM-7(b)
  - disable_strategy
  - low_complexity
  - low_disruption
  - low_severity
  - no_reboot_needed
  - service_mdmonitor_disabled

- name: Disable Software RAID Monitor (mdmonitor) - Ensure mdmonitor.service is Masked
  ansible.builtin.systemd:
    name: mdmonitor.service
    state: stopped
    enabled: false
    masked: true
  when:
  - '"kernel" in ansible_facts.packages'
  - service_exists.stdout_lines is search("mdmonitor.service", multiline=True)
  tags:
  - NIST-800-53-CM-6(a)
  - NIST-800-53-CM-7(a)
  - NIST-800-53-CM-7(b)
  - disable_strategy
  - low_complexity
  - low_disruption
  - low_severity
  - no_reboot_needed
  - service_mdmonitor_disabled

- name: Unit Socket Exists - mdmonitor.socket
  ansible.builtin.command: systemctl -q list-unit-files mdmonitor.socket
  register: socket_file_exists
  changed_when: false
  failed_when: socket_file_exists.rc not in [0, 1]
  check_mode: false
  when: '"kernel" in ansible_facts.packages'
  tags:
  - NIST-800-53-CM-6(a)
  - NIST-800-53-CM-7(a)
  - NIST-800-53-CM-7(b)
  - disable_strategy
  - low_complexity
  - low_disruption
  - low_severity
  - no_reboot_needed
  - service_mdmonitor_disabled

- name: Disable Software RAID Monitor (mdmonitor) - Disable Socket mdmonitor
  ansible.builtin.systemd:
    name: mdmonitor.socket
    enabled: false
    state: stopped
    masked: true
  when:
  - '"kernel" in ansible_facts.packages'
  - socket_file_exists.stdout_lines is search("mdmonitor.socket", multiline=True)
  tags:
  - NIST-800-53-CM-6(a)
  - NIST-800-53-CM-7(a)
  - NIST-800-53-CM-7(b)
  - disable_strategy
  - low_complexity
  - low_disruption
  - low_severity
  - no_reboot_needed
  - service_mdmonitor_disabled

# Remediation is applicable only in certain platforms
if rpm --quiet -q kernel; then

SYSTEMCTL_EXEC='/usr/bin/systemctl'
"$SYSTEMCTL_EXEC" stop 'mdmonitor.service'
"$SYSTEMCTL_EXEC" disable 'mdmonitor.service'"$SYSTEMCTL_EXEC" mask 'mdmonitor.service'
# Disable socket activation if we have a unit file for it
if "$SYSTEMCTL_EXEC" -q list-unit-files mdmonitor.socket; then
    "$SYSTEMCTL_EXEC" stop 'mdmonitor.socket'
    "$SYSTEMCTL_EXEC" mask 'mdmonitor.socket'
fi
# The service may not be running because it has been started and failed,
# so let's reset the state so OVAL checks pass.
# Service should be 'inactive', not 'failed' after reboot though.
"$SYSTEMCTL_EXEC" reset-failed 'mdmonitor.service' || true

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

Disable Software RAID Monitor (mdmonitor)

Description

Rationale

Remediation - OS Build Blueprint

Remediation - Kubernetes Patch

Remediation - Puppet

Remediation - script:kickstart

Remediation - Ansible

Remediation - Shell Script