Disable vsftpd Service

An XCCDF Rule

Description

The vsftpd service can be disabled with the following command:

$ sudo systemctl mask --now vsftpd.service

Rationale

Running FTP server software provides a network-based avenue of attack, and should be disabled if not needed. Furthermore, the FTP protocol is unencrypted and creates a risk of compromising sensitive information.

ID: xccdf_org.ssgproject.content_rule_service_vsftpd_disabled
Severity: Medium
References: 11 14 3 9

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

CCI-001436

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

2.2.10

CCE-91366-5
Updated: 5 days ago


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

include disable_vsftpd

class disable_vsftpd {
  service {'vsftpd':
    enable => false,
    ensure => 'stopped',  }
}

- name: Gather the package facts
  package_facts:
    manager: auto
  tags:
  - CCE-91366-5
  - NIST-800-53-CM-6(a)  - NIST-800-53-CM-7(a)
  - NIST-800-53-CM-7(b)
  - disable_strategy
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - service_vsftpd_disabled

- name: Disable vsftpd Service - 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-default" in ansible_facts.packages'
  tags:
  - CCE-91366-5
  - NIST-800-53-CM-6(a)
  - NIST-800-53-CM-7(a)
  - NIST-800-53-CM-7(b)
  - disable_strategy
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - service_vsftpd_disabled

- name: Disable vsftpd Service - Ensure vsftpd.service is Masked
  ansible.builtin.systemd:
    name: vsftpd.service
    state: stopped
    enabled: false
    masked: true
  when:
  - '"kernel-default" in ansible_facts.packages'
  - service_exists.stdout_lines is search("vsftpd.service", multiline=True)
  tags:
  - CCE-91366-5
  - NIST-800-53-CM-6(a)
  - NIST-800-53-CM-7(a)
  - NIST-800-53-CM-7(b)
  - disable_strategy
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - service_vsftpd_disabled

- name: Unit Socket Exists - vsftpd.socket
  ansible.builtin.command: systemctl -q list-unit-files vsftpd.socket
  register: socket_file_exists
  changed_when: false
  failed_when: socket_file_exists.rc not in [0, 1]
  check_mode: false
  when: '"kernel-default" in ansible_facts.packages'
  tags:
  - CCE-91366-5
  - NIST-800-53-CM-6(a)
  - NIST-800-53-CM-7(a)
  - NIST-800-53-CM-7(b)
  - disable_strategy
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - service_vsftpd_disabled

- name: Disable vsftpd Service - Disable Socket vsftpd
  ansible.builtin.systemd:
    name: vsftpd.socket
    enabled: false
    state: stopped
    masked: true
  when:
  - '"kernel-default" in ansible_facts.packages'
  - socket_file_exists.stdout_lines is search("vsftpd.socket", multiline=True)
  tags:
  - CCE-91366-5
  - NIST-800-53-CM-6(a)
  - NIST-800-53-CM-7(a)
  - NIST-800-53-CM-7(b)
  - disable_strategy
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - service_vsftpd_disabled

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

SYSTEMCTL_EXEC='/usr/bin/systemctl'
"$SYSTEMCTL_EXEC" stop 'vsftpd.service'
"$SYSTEMCTL_EXEC" disable 'vsftpd.service'"$SYSTEMCTL_EXEC" mask 'vsftpd.service'
# Disable socket activation if we have a unit file for it
if "$SYSTEMCTL_EXEC" -q list-unit-files vsftpd.socket; then
    "$SYSTEMCTL_EXEC" stop 'vsftpd.socket'
    "$SYSTEMCTL_EXEC" mask 'vsftpd.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 'vsftpd.service' || true

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

Disable vsftpd Service

Description

Rationale

Remediation - OS Build Blueprint

Remediation - Puppet

Remediation - Ansible

Remediation - Shell Script