Add RHEL 9 CIS-inspired hardening playbook

2026-05-06 08:45:33 +00:00
parent 1e2db3e125
commit 75a11f7650
20 changed files with 711 additions and 0 deletions
@@ -0,0 +1,79 @@
+---
+- name: Validate sshd effective configuration syntax
+  ansible.builtin.command: sshd -t
+  register: cis_sshd_validate
+  changed_when: false
+  check_mode: false
+
+- name: Read sysctl values for validation
+  ansible.builtin.command: "sysctl -n {{ item.key }}"
+  loop: "{{ cis_sysctl_settings | dict2items }}"
+  loop_control:
+    label: "{{ item.key }}"
+  register: cis_sysctl_validation
+  changed_when: false
+  failed_when: false
+  check_mode: false
+  when: cis_enable_sysctl_hardening | bool
+
+- name: Gather final service facts
+  ansible.builtin.service_facts:
+
+- name: Build service state summary
+  ansible.builtin.set_fact:
+    cis_service_state_summary:
+      chronyd: "{{ ansible_facts.services['chronyd.service'].state | default('not-found') }}"
+      auditd: "{{ ansible_facts.services['auditd.service'].state | default('not-found') }}"
+      rsyslog: "{{ ansible_facts.services['rsyslog.service'].state | default('not-found') }}"
+
+- name: Build sysctl validation summary
+  ansible.builtin.set_fact:
+    cis_sysctl_validation_summary: "{{ cis_sysctl_validation_summary | default({}) | combine({item.item.key: item.stdout | default('unreadable')}) }}"
+  loop: "{{ cis_sysctl_validation.results | default([]) }}"
+  loop_control:
+    label: "{{ item.item.key }}"
+  when: cis_enable_sysctl_hardening | bool
+
+- name: Build mount option change summary
+  ansible.builtin.set_fact:
+    cis_mount_option_summary: >-
+      {{
+        cis_mount_option_results.results
+        | default([])
+        | selectattr('changed', 'defined')
+        | selectattr('changed')
+        | map(attribute='item.path')
+        | list
+      }}
+
+- name: Publish validation summary
+  ansible.builtin.set_fact:
+    cis_validation_summary:
+      benchmark: "CIS RHEL 9 Benchmark {{ cis_benchmark_version }} inspired controls"
+      sshd_config: "{{ 'OK' if cis_sshd_validate.rc == 0 else 'CRITICAL' }}"
+      services: "{{ cis_service_state_summary }}"
+      sysctl: "{{ cis_sysctl_validation_summary | default({}) }}"
+      mount_option_updates: "{{ cis_mount_option_summary | default([]) }}"
+      applied_controls:
+        - ssh
+        - packages
+        - sysctl
+        - services
+        - audit
+        - sudo
+        - logging
+        - filesystem
+
+- name: Show service states
+  ansible.builtin.debug:
+    var: cis_service_state_summary
+
+- name: Show changed mount options
+  ansible.builtin.debug:
+    msg: >-
+      {{ cis_mount_option_summary | default([]) if cis_mount_option_summary | default([]) | length > 0
+         else 'OK: No mount option changes were applied.' }}
+
+- name: Show applied control summary
+  ansible.builtin.debug:
+    var: cis_validation_summary