Verify Group Who Owns /etc/sysconfig/sshd File

Cette page n'est pas encore disponible en français, sa traduction est en cours.
Si vous avez des questions ou des retours sur notre projet de traduction actuel, n'hésitez pas à nous contacter.

Description

To properly set the group owner of /etc/sysconfig/sshd, run the command:

$ sudo chgrp root /etc/sysconfig/sshd

Rationale

The /etc/sysconfig/sshd file contains configuration options for the SSH daemon. Protection of this file is important for system security. The file should be owned by the root group to prevent unauthorized changes.

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 rpm --quiet -q kernel-core; then

newgroup=""
if getent group "0" >/dev/null 2>&1; then
  newgroup="0"
fi

if [[ -z "${newgroup}" ]]; then
  >&2 echo "0 is not a defined group on the system"
else
if ! stat -c "%g %G" "/etc/sysconfig/sshd" | grep -E -w -q "0"; then
    chgrp --no-dereference "$newgroup" /etc/sysconfig/sshd
fi

fi

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:
  - CCE-89268-7
  - configure_strategy
  - file_groupowner_etc_sysconfig_sshd
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Set the file_groupowner_etc_sysconfig_sshd_newgroup variable if represented
    by gid
  ansible.builtin.set_fact:
    file_groupowner_etc_sysconfig_sshd_newgroup: '0'
  when: '"kernel-core" in ansible_facts.packages'
  tags:
  - CCE-89268-7
  - configure_strategy
  - file_groupowner_etc_sysconfig_sshd
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Test for existence /etc/sysconfig/sshd
  ansible.builtin.stat:
    path: /etc/sysconfig/sshd
  register: file_exists
  when: '"kernel-core" in ansible_facts.packages'
  tags:
  - CCE-89268-7
  - configure_strategy
  - file_groupowner_etc_sysconfig_sshd
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Ensure group owner on /etc/sysconfig/sshd
  ansible.builtin.file:
    path: /etc/sysconfig/sshd
    follow: false
    group: '{{ file_groupowner_etc_sysconfig_sshd_newgroup }}'
  when:
  - '"kernel-core" in ansible_facts.packages'
  - file_exists.stat is defined and file_exists.stat.exists
  tags:
  - CCE-89268-7
  - configure_strategy
  - file_groupowner_etc_sysconfig_sshd
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed