RHEL9-CIS/tasks/prelim.yml

---

# Preliminary tasks that should always be run
# List users in order to look files inside each home directory
- name: "PRELIM | List users accounts"
  shell: "awk -F: '{print $1}' /etc/passwd"
  args:
      warn: false
  changed_when: false
  check_mode: false
  register: users
  tags:
      - level1-server
      - level1-workstation
      - users

- name: "PRELIM | Gather accounts with empty password fields"
  shell: "cat /etc/shadow | awk -F: '($2 == \"\" ) {j++;print $1; } END {exit j}'"
  args:
      warn: false
  changed_when: false
  check_mode: false
  register: empty_password_accounts
  tags:
      - level1-server
      - level1-workstation
      - passwords

- name: "PRELIM | Gather UID 0 accounts other than root"
  shell: "cat /etc/passwd | awk -F: '($3 == 0 && $1 != \"root\") {i++;print $1 } END {exit i}'"
  args:
      warn: false
  changed_when: false
  check_mode: false
  register: uid_zero_accounts_except_root
  tags:
      - level1-server
      - level1-workstation
      - users

- name: "PRELIM | Setup crypto-policy"
  block:
      - name: "PRELIM | Install crypto-policies"
        dnf:
            name:
                - crypto-policies
                - crypto-policies-scripts
            state: present

      - name: "PRELIM | Gather system-wide crypto-policy"
        shell: update-crypto-policies --show
        args:
            warn: false
        changed_when: false
        check_mode: false
        register: system_wide_crypto_policy
  when:
      - rhel9cis_rule_1_10 or
        rhel9cis_rule_1_11
  tags:
      - level1-server
      - level1-workstation
      - rule_1.10 or
        rule_1.11
      - crypto

- name: "PRELIM | if systemd coredump"
  stat:
      path: /etc/systemd/coredump.conf
  register: systemd_coredump
  when:
      - rhel9cis_rule_1_6_1
  tags:
      - level1-server
      - level1-workstation
      - rule_1.6.1
      - systemd

- name: "PRELIM | Section 1.1 | Create list of mount points"
  set_fact:
      mount_names: "{{ ansible_mounts | map(attribute='mount') | list }}"
  tags:
      - level1-server
      - level1-workstation

- name: "PRELIM | Section 4.1 | Configure System Accounting (auditd)"
  package:
      name: audit
      state: present
  become: true
  when: 
      - '"auditd" not in ansible_facts.packages'
      - rhel9cis_rule_4_1_1_1
  tags:
      - level2-server
      - level2-workstation
      - patch
      - rule_4.1.1.1
      - auditd

- name: "PRELIM | 4.1.12 | Ensure successful file system mounts are collected"
  shell: for i in  $(df | grep '^/dev' | awk '{ print $NF }'); do find $i -xdev -type f -perm -4000 -o -type f -perm -2000 2>/dev/null; done
  changed_when: false
  failed_when: false
  check_mode: false
  register: priv_procs
  tags:
      - level1-server
      - level1-workstation
      - always

- name: "PRELIM | Section 5.1 | Configure cron"
  package:
      name: cronie
      state: present
  become: true
  when:
      - rhel9cis_rule_5_1_1
      - '"cronie" not in ansible_facts.packages'
  tags:
      - level1-server
      - level1-workstation
      - rule_5.1.1
      - cron

- name: "PRELIM | Install authconfig"
  package:
      name: authconfig
      state: present
  become: true
  when:
      - rhel9cis_use_authconfig
      - rhel9cis_rule_5_3_1 or
        rhel9cis_rule_5_3_2 or
        rhel9cis_rule_5_3_3 or
       '"authconfig" not in ansible_facts.packages or
       "auditd-lib" not in ansible_facts.packages'
  tags:
      - level1-server
      - level1-workstation
      - rule_5.3.1 or
        rule_5.3.2 or
        rule_5.3.3
      - authconfig
      - auditd

- name: "PRELIM | Set facts based on boot type"
  block:
      - name: "PRELIM | Check whether machine is UEFI-based"
        stat:
            path: /sys/firmware/efi
        register: rhel_09_efi_boot

      - name: "PRELIM | AUDIT | set legacy boot and grub path | Bios"
        set_fact:
            rhel9cis_legacy_boot: true
            grub2_path: /etc/grub2.cfg
        when: not rhel_09_efi_boot.stat.exists

      - name: "PRELIM | set grub fact | UEFI"
        set_fact:
            grub2_path: /etc/grub2-efi.cfg
        when: rhel_09_efi_boot.stat.exists
  when:
      - not system_is_container
  tags:
      - bootloader
      - grub

- name: "PRELIM | AUDIT | Ensure permissions on bootloader config are configured | Get grub config file stats"
  stat:
      path: "{{ grub2_path }}"
  changed_when: false
  register: grub_cfg
  when:
      - not system_is_container
  tags:
      - bootloader
      - grub

- name: "PRELIM | Check for rhnsd service"
  shell: "systemctl show rhnsd | grep LoadState | cut -d = -f 2"
  changed_when: false
  check_mode: false
  become: true
  register: rhnsd_service_status
  when:
      - rhel9cis_rule_1_2_2
      - ansible_distribution == "RedHat"
  tags:
      - rule_1.2.2
      - skip_ansible_lint

- name: "PRELIM | AUDIT | Discover Interactive UID MIN and MIN from logins.def"
  block:
      - name: "PRELIM | AUDIT | Capture UID_MIN information from logins.def"
        shell: grep -w "^UID_MIN" /etc/login.defs | awk '{print $NF}'
        changed_when: false
        register: uid_min_id
   
      - name: "PRELIM | AUDIT | Capture UID_MAX information from logins.def"
        shell: grep -w "^UID_MAX" /etc/login.defs | awk '{print $NF}'
        changed_when: false
        register: uid_max_id

      - name: "PRELIM | AUDIT | Capture GID_MIN information from logins.def"
        shell: grep -w "^GID_MIN" /etc/login.defs | awk '{print $NF}'
        changed_when: false
        register: gid_min_id

      - name: "PRELIM | AUDIT | set_facts for interactive uid/gid"
        set_fact:
            min_int_uid: "{{ uid_min_id.stdout }}"
            max_int_uid: "{{ uid_max_id.stdout }}"
            min_int_gid: "{{ gid_min_id.stdout }}"
- debug:
    msg: "{{ min_int_uid }} {{ max_int_uid }}"

  when:
      - not discover_int_uid