Verify Grouponwership of Files in /var/log/sssd

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Description

To properly set the group owner of /var/log/sssd/*, run the command:

$ sudo chgrp sssd /var/log/sssd/*

or

$ sudo chgrp root /var/log/sssd/*

Rationale

The /var/log/sssd directory contains debug logs for the System Security Services Daemon (SSSD) and should only be accessed by authorized personnel.

Remediation

Shell script

The following script can be run on the host to remediate the issue.

#!/bin/bash

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

if [[ -z "${newgroup}" ]]; then
  >&2 echo "sssd and root is not a defined group on the system"
else
find -P /var/log/sssd/  -type f  ! -group sssd ! -group root -regextype posix-extended -regex '.*' -exec chgrp --no-dereference "$newgroup" {} \;

fi

Ansible playbook

The following playbook can be run with Ansible to remediate the issue.

- name: Check that the sssd group is defined
  ansible.builtin.getent:
    database: group
    key: sssd
  ignore_errors: true
  when: file_groupownerships_var_log_sssd_newgroup is undefined
  tags:
  - configure_strategy
  - file_groupownerships_var_log_sssd
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Set the file_groupownerships_var_log_sssd_newgroup variable if sssd found
  ansible.builtin.set_fact:
    file_groupownerships_var_log_sssd_newgroup: sssd
  when: ansible_facts.getent_group["sssd"] is defined
  tags:
  - configure_strategy
  - file_groupownerships_var_log_sssd
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Check that the root group is defined
  ansible.builtin.getent:
    database: group
    key: root
  ignore_errors: true
  when: file_groupownerships_var_log_sssd_newgroup is undefined
  tags:
  - configure_strategy
  - file_groupownerships_var_log_sssd
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Set the file_groupownerships_var_log_sssd_newgroup variable if root found
  ansible.builtin.set_fact:
    file_groupownerships_var_log_sssd_newgroup: root
  when: ansible_facts.getent_group["root"] is defined
  tags:
  - configure_strategy
  - file_groupownerships_var_log_sssd
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Find /var/log/sssd/ file(s) matching .* recursively
  ansible.builtin.command: find -P /var/log/sssd/  -type f  ! -group sssd ! -group
    root -regextype posix-extended -regex ".*"
  register: files_found
  changed_when: false
  failed_when: false
  check_mode: false
  tags:
  - configure_strategy
  - file_groupownerships_var_log_sssd
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Ensure group owner on /var/log/sssd/ file(s) matching .*
  ansible.builtin.file:
    path: '{{ item }}'
    follow: false
    group: '{{ file_groupownerships_var_log_sssd_newgroup }}'
    state: file
  with_items:
  - '{{ files_found.stdout_lines }}'
  tags:
  - configure_strategy
  - file_groupownerships_var_log_sssd
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed