March 24 updates

Changelog.md

@@ -1,5 +1,24 @@
 # Amazon 2023 CIS - 26th June 2023
 
+## 1.0.1
+
+- thanks to @DianaMariaDDM
+  - #59
+  - #60
+  - #61
+  - #62
+
+- #64 thanks to @tom-henderson
+
+- extended with new options to force changes for 4.6.1.1|2|3 default false
+  - amzn2023cis_force_user_maxdays
+  - amzn2023cis_force_user_mindays
+  - amzn2023cis_force_user_warndays
+
+- pre-commit updates
+
+- general tidy up
+
 ## 1.0 Multiple changes
 
 - Audit binary updated goss 0.4.4

defaults/main.yml

@@ -961,6 +961,15 @@ amzn2023cis_pass:
     # CIS requires a value of at least 7.
     warn_age: 7
 
+# 4.6.1.1 Allow the interactive users not in compliance to force the maxdays change
+amzn2023cis_force_user_maxdays: false
+
+# 4.6.1.2 Allow the interactive users not in compliance to force the mindays change
+amzn2023cis_force_user_mindays: false
+
+# 4.6.1.3 Allow the interactive users not in compliance to force the warndays change
+amzn2023cis_force_user_warnage: false
+
 ## Control 4.6.1.4 - Ensure inactive password lock is 30 days or less
 amzn2023cis_inactivelock:
     # The following variable refers to the period of time when

tasks/main.yml

@@ -2,12 +2,12 @@
 # tasks file for AMAZON2023
 
 - name: Check OS version and family
-  when:
-      - os_check
   ansible.builtin.assert:
       that: (ansible_facts.distribution == 'Amazon' and ansible_facts.distribution_major_version is version_compare('2023', '=='))
       fail_msg: "This role can only be run against Supported OSs. {{ ansible_facts.distribution }} {{ ansible_facts.distribution_major_version }} is not supported."
       success_msg: "This role is running against a supported OS {{ ansible_facts.distribution }} {{ ansible_facts.distribution_major_version }}"
+  when:
+      - os_check
   tags:
       - always
 
@@ -42,8 +42,8 @@
 
 - name: Setup rules if container
   when:
-      - ansible_connection == 'docker' or
-        ansible_facts.virtualization_type in ["docker", "lxc", "openvz", "podman", "container"]
+      - ansible_connection == 'docker' or ( ansible_virtualization_type is defined and
+        ansible_virtualization_type in ["docker", "lxc", "openvz", "podman", "container"])
   block:
       - name: Discover and set container variable if required
         ansible.builtin.set_fact:

tasks/prelim.yml

@@ -2,25 +2,34 @@
 
 # Preliminary tasks that should always be run
 # List users in order to look files inside each home directory
-- name: "PRELIM | List users accounts"
-  ansible.builtin.shell: "awk -F: '{print $1}' /etc/passwd"
-  changed_when: false
-  check_mode: false
-  register: users
+
+- name: "PRELIM | AUDIT | Interactive Users"
   tags:
-      - level1-server
-      - users
+      - always
+  ansible.builtin.shell: >
+      grep -E -v '^(root|halt|sync|shutdown)' /etc/passwd | awk -F: '(!index($7, "sbin/nologin") && $7 != "/bin/nologin" && $7 != "/bin/false") { print $1 }'
+  changed_when: false
+  register: discovered_interactive_usernames
 
-- name: "PRELIM | capture /etc/password variables"
-  ansible.builtin.include_tasks:
-      file: parse_etc_password.yml
+- name: "PRELIM | AUDIT | Interactive User accounts home directories"
   tags:
       - always
+  ansible.builtin.shell: >
+      grep -E -v '^(root|halt|sync|shutdown)' /etc/passwd | awk -F: '(!index($7, "sbin/nologin") && $7 != "/bin/nologin" && $7 != "/bin/false") { print $6 }'
+  changed_when: false
+  register: discovered_interactive_users_home
 
-- name: "PRELIM | Interactive User accounts"
-  ansible.builtin.shell: 'cat /etc/passwd | grep -Ev "nologin|/sbin" | cut -d: -f6'
+- name: "PRELIM | AUDIT | Interactive UIDs"
+  tags:
+      - always
+  ansible.builtin.shell: >
+      grep -E -v '^(root|halt|sync|shutdown)' /etc/passwd | awk -F: '(!index($7, "sbin/nologin") && $7 != "/bin/nologin" && $7 != "/bin/false") { print $3 }'
   changed_when: false
-  register: interactive_users_home
+  register: discovered_interactive_uids
+
+- name: "PRELIM | capture /etc/password variables"
+  ansible.builtin.include_tasks:
+      file: parse_etc_password.yml
   tags:
       - always
 
@@ -175,6 +184,31 @@
   tags:
       - always
 
+- name: "PRELIM | 4.3.4 | Find all sudoers files."
+  ansible.builtin.shell: "find /etc/sudoers /etc/sudoers.d/ -type f ! -name '*~' ! -name '*.*'"
+  changed_when: false
+  failed_when: false
+  check_mode: false
+  register: amzn2023cis_sudoers_files
+  when:
+      - amzn2023cis_rule_4_3_4
+  tags:
+      - rule_4.3.4
+      - sudo
+      - patch
+
+- name: "PRELIM | 4.4.x | Install authselect"
+  ansible.builtin.package:
+      name: authselect
+      state: present
+  become: true
+  when:
+      - '"authselect" not in ansible_facts.packages'
+      - amzn2023cis_rule_4_4_1
+      - amzn2023cis_rule_4_4_2
+  tags:
+      - always
+
 - name: "PRELIM | Section 5.2 | Configure System Accounting (auditd)"
   ansible.builtin.package:
       name: audit
@@ -208,19 +242,6 @@
       - rule_5.2.4.6
       - rule_5.2.4.7
 
-- name: "PRELIM | 4.3.4 | Find all sudoers files."
-  ansible.builtin.shell: "find /etc/sudoers /etc/sudoers.d/ -type f ! -name '*~' ! -name '*.*'"
-  changed_when: false
-  failed_when: false
-  check_mode: false
-  register: amzn2023cis_sudoers_files
-  when:
-      - amzn2023cis_rule_4_3_4
-  tags:
-      - rule_4.3.4
-      - sudo
-      - patch
-
 - name: "PRELIM | Discover Interactive UID MIN and MIN from logins.def"
   block:
       - name: "PRELIM | Capture UID_MIN information from logins.def"

tasks/section_4/cis_4.6.1.x.yml

@@ -1,10 +1,29 @@
 ---
 
 - name: "4.6.1.1 | PATCH | Ensure password expiration is 365 days or less"
-  ansible.builtin.lineinfile:
-      path: /etc/login.defs
-      regexp: '^PASS_MAX_DAYS'
-      line: "PASS_MAX_DAYS {{ amzn2023cis_pass['max_days'] }}"
+  block:
+      - name: "4.6.1.1 | PATCH | Ensure password expiration is 365 days or less"
+        ansible.builtin.lineinfile:
+            path: /etc/login.defs
+            regexp: '^PASS_MAX_DAYS'
+            line: "PASS_MAX_DAYS {{ amzn2023cis_pass['max_days'] }}"
+
+      - name: "4.6.1.1 | AUDIT | Ensure password expiration is 365 days or less | Get existing users PASS_MAX_DAYS"
+        ansible.builtin.shell: "awk -F: '(/^[^:]+:[^!*]/ && ($5> {{ amzn2023cis_pass['max_days'] }} || $5< {{ amzn2023cis_pass['max_days'] }} || $5 == -1)){print $1}' /etc/shadow"
+        changed_when: false
+        failed_when: false
+        register: discovered_max_days
+
+      - name: "4.6.1.1 | PATCH | Ensure password expiration is 365 days or less | Set existing users PASS_MAX_DAYS"
+        ansible.builtin.user:
+            name: "{{ item }}"
+            password_expire_max: "{{ amzn2023cis_pass['max_days'] }}"
+        loop: "{{ discovered_max_days.stdout_lines }}"
+        when:
+            - discovered_max_days.stdout_lines | length > 0
+            - item in discovered_interactive_usernames.stdout
+            - amzn2023cis_force_user_maxdays
+
   when:
       - amzn2023cis_rule_4_6_1_1
   tags:
@@ -19,10 +38,29 @@
       - nist_sp800-53r5_IA-5
 
 - name: "4.6.1.2 | PATCH | Ensure minimum days between password changes is configured"
-  ansible.builtin.lineinfile:
-      path: /etc/login.defs
-      regexp: '^PASS_MIN_DAYS'
-      line: "PASS_MIN_DAYS {{ amzn2023cis_pass['min_days'] }}"
+  block:
+      - name: "4.6.1.2 | PATCH | Ensure minimum days between password changes is configured | set login.defs"
+        ansible.builtin.lineinfile:
+            path: /etc/login.defs
+            regexp: '^PASS_MIN_DAYS'
+            line: "PASS_MIN_DAYS {{ amzn2023cis_pass['min_days'] }}"
+
+      - name: "4.6.1.2 | AUDIT | Ensure minimum days between password changes is configured | Get existing users PASS_MIN_DAYS"
+        ansible.builtin.shell: "awk -F: '/^[^:]+:[^!*]/ && $4< {{ amzn2023cis_pass['min_days'] }} {print $1}' /etc/shadow"
+        changed_when: false
+        failed_when: false
+        register: discovered_min_days
+
+      - name: "4.6.1.2 | PATCH | Ensure minimum days between password changes is configured | Set existing users PASS_MIN_DAYS"
+        ansible.builtin.user:
+            name: "{{ item }}"
+            password_expire_max: "{{ amzn2023cis_pass['min_days'] }}"
+        loop: "{{ discovered_min_days.stdout_lines }}"
+        when:
+            - discovered_min_days.stdout_lines | length > 0
+            - item in discovered_interactive_usernames.stdout
+            - amzn2023cis_force_user_mindays
+
   when:
       - amzn2023cis_rule_4_6_1_2
   tags:
@@ -37,10 +75,26 @@
       - nist_sp800-53r5_IA-5
 
 - name: "4.6.1.3 | PATCH | Ensure password expiration warning days is 7 or more"
-  ansible.builtin.lineinfile:
-      path: /etc/login.defs
-      regexp: '^PASS_WARN_AGE'
-      line: "PASS_WARN_AGE {{ amzn2023cis_pass['warn_age'] }}"
+  block:
+      - name: "4.6.1.3 | PATCH | Ensure password expiration warning days is 7 or more | set login.defs"
+        ansible.builtin.lineinfile:
+            path: /etc/login.defs
+            regexp: '^PASS_WARN_AGE'
+            line: "PASS_WARN_AGE {{ amzn2023cis_pass['warn_age'] }}"
+
+      - name: "4.6.1.3 | AUDIT | Ensure password expiration warning days is 7 or more | Get existing users WARN_DAYS"
+        ansible.builtin.shell: "awk -F: '/^[^:]+:[^!*]/ && $6< {{ amzn2023cis_pass['warn_age'] }} {print $1}' /etc/shadow"
+        changed_when: false
+        failed_when: false
+        register: discovered_warn_days
+
+      - name: "4.6.1.3 | PATCH | Ensure password expiration warning days is 7 or more | Set existing users WARN_DAYS"
+        ansible.builtin.shell: "chage --warndays {{ amzn2023cis_pass['warn_age'] }} {{ item }}"
+        loop: "{{ discovered_warn_days.stdout_lines }}"
+        when:
+            - discovered_warn_days.stdout_lines | length > 0
+            - item in discovered_interactive_usernames.stdout
+            - amzn2023cis_force_user_warnage
   when:
       - amzn2023cis_rule_4_6_1_3
   tags:

tasks/section_5/cis_5.2.4.x.yml

@@ -63,12 +63,11 @@
 - name: "5.2.4.5 | PATCH | Ensure audit configuration files are 640 or more restrictive"
   ansible.builtin.file:
       path: "{{ item.path }}"
-      mode: '0640'
-  loop: "{{ auditd_conf_files.files }}"
+      mode: g-wx,o-rwx
+  loop: "{{ auditd_conf_files.files | default([]) }}"
   loop_control:
       label: "{{ item.path }}"
   when:
-      - item.mode != '06(0|4)0'
       - amzn2023cis_rule_5_2_4_5
   tags:
       - level2-server

tasks/section_6/cis_6.2.x.yml

@@ -317,7 +317,7 @@
             etype: group
             permissions: rx
             state: present
-        loop: "{{ interactive_users_home.stdout_lines }}"
+        loop: "{{ discovered_interactive_users_home.stdout_lines }}"
         when: not system_is_container
 
       - name: "6.2.10 | PATCH | Ensure local interactive user home directories exist | Set other ACL"
@@ -327,7 +327,7 @@
             etype: other
             permissions: 0
             state: present
-        loop: "{{ interactive_users_home.stdout_lines }}"
+        loop: "{{ discovered_interactive_users_home.stdout_lines }}"
         when: not system_is_container
   when:
       - amzn2023cis_rule_6_2_10
@@ -368,9 +368,9 @@
             path: "{{ item }}"
             state: absent
         loop:
-            - "{{ interactive_users_home.stdout_lines }}/.netrc"
-            - "{{ interactive_users_home.stdout_lines }}/.rhosts"
-            - "{{ interactive_users_home.stdout_lines }}/.forward"
+            - "{{ discovered_interactive_users_home.stdout_lines }}/.netrc"
+            - "{{ discovered_interactive_users_home.stdout_lines }}/.rhosts"
+            - "{{ discovered_interactive_users_home.stdout_lines }}/.forward"
         when: amzn2023cis_remove_other_dot_files
 
   when: