Verify User Who Owns /etc/sysconfig/sshd File

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Description

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

$ sudo chown 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 root 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

newown=""
if id "0" >/dev/null 2>&1; then
  newown="0"
fi

if [[ -z "$newown" ]]; then
  >&2 echo "0 is not a defined user on the system"
else
if ! stat -c "%u %U" "/etc/sysconfig/sshd" | grep -E -w -q "0"; then
    chown --no-dereference "$newown" /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-89269-5
  - configure_strategy
  - file_owner_etc_sysconfig_sshd
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Set the file_owner_etc_sysconfig_sshd_newown variable if represented by uid
  ansible.builtin.set_fact:
    file_owner_etc_sysconfig_sshd_newown: '0'
  when: '"kernel-core" in ansible_facts.packages'
  tags:
  - CCE-89269-5
  - configure_strategy
  - file_owner_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-89269-5
  - configure_strategy
  - file_owner_etc_sysconfig_sshd
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Ensure owner on /etc/sysconfig/sshd
  ansible.builtin.file:
    path: /etc/sysconfig/sshd
    follow: false
    owner: '{{ file_owner_etc_sysconfig_sshd_newown }}'
  when:
  - '"kernel-core" in ansible_facts.packages'
  - file_exists.stat is defined and file_exists.stat.exists
  tags:
  - CCE-89269-5
  - configure_strategy
  - file_owner_etc_sysconfig_sshd
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed