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Replacing secure-configuration of 'audit' and 'audit_backlog_limit' from the /etc/default/grub approach to grubby(actually used by CIS)

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Signed-off-by: Ionut Pruteanu <ionut.pruteanu@siemens.com>
This commit is contained in:
Ionut Pruteanu 2024-01-26 16:52:28 +02:00
parent 3fe681c0d2
commit 18803420f0
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GPG key ID: 95B7D43B702B3569
1 changed files with 14 additions and 36 deletions
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50
tasks/section_4/cis_4.1.1.x.yml
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@ -24,28 +24,17 @@
- name: "4.1.1.2 | PATCH | Ensure auditing for processes that start prior to auditd is enabled"
block:
- name: "4.1.1.2 | AUDIT | Ensure auditing for processes that start prior to auditd is enabled | Get GRUB_CMDLINE_LINUX"
ansible.builtin.shell: grep 'GRUB_CMDLINE_LINUX=' /etc/default/grub | sed 's/.$//'
- name: "4.1.1.2 | PATCH | Ensure auditing for processes that start prior to auditd is enabled | Grubby existence of current value"
ansible.builtin.shell: grubby --info=ALL | grep args | grep -o -E "audit=([[:digit:]])+" | grep -o -E "([[:digit:]])+"
changed_when: false
failed_when: false
check_mode: false
register: rhel9cis_4_1_1_2_grub_cmdline_linux
register: rhel9cis_4_1_1_2_grubby_curr_value_audit_linux
- name: "4.1.1.2 | PATCH | Ensure auditing for processes that start prior to auditd is enabled | Replace existing setting"
ansible.builtin.replace:
path: /etc/default/grub
regexp: 'audit=.'
replace: 'audit=1'
notify: Grub2cfg
when: "'audit=' in rhel9cis_4_1_1_2_grub_cmdline_linux.stdout"
- name: "4.1.1.2 | PATCH | Ensure auditing for processes that start prior to auditd is enabled | Add audit setting if missing"
ansible.builtin.lineinfile:
path: /etc/default/grub
regexp: '^GRUB_CMDLINE_LINUX='
line: '{{ rhel9cis_4_1_1_2_grub_cmdline_linux.stdout }} audit=1"'
notify: Grub2cfg
when: "'audit=' not in rhel9cis_4_1_1_2_grub_cmdline_linux.stdout"
- name: "4.1.1.2 | PATCH | Ensure auditing for processes that start prior to auditd is enabled | Grubby update, if needed"
ansible.builtin.shell: grubby --update-kernel=ALL --args="audit=1"
when:
- rhel9cis_4_1_1_2_grubby_curr_value_audit_linux is not defined or rhel9cis_4_1_1_2_grubby_curr_value_audit_linux | int != 1
when:
- rhel9cis_rule_4_1_1_2
tags:
@ -58,28 +47,17 @@
- name: "4.1.1.3 | PATCH | Ensure audit_backlog_limit is sufficient"
block:
- name: "4.1.1.3 | AUDIT | Ensure audit_backlog_limit is sufficient | Get GRUB_CMDLINE_LINUX"
ansible.builtin.shell: grep 'GRUB_CMDLINE_LINUX=' /etc/default/grub | sed 's/.$//'
- name: "4.1.1.3 | AUDIT | Ensure audit_backlog_limit is sufficient | Grubby existence of current value"
ansible.builtin.shell: grubby --info=ALL | grep args | grep -o -E "audit_backlog_limit=([[:digit:]])+" | grep -o -E "([[:digit:]])+"
changed_when: false
failed_when: false
check_mode: false
register: rhel9cis_4_1_1_3_grub_cmdline_linux
register: rhel9cis_4_1_1_3_grubby_curr_value_backlog_linux
- name: "4.1.1.3 | PATCH | Ensure audit_backlog_limit is sufficient | Replace existing setting"
ansible.builtin.replace:
path: /etc/default/grub
regexp: 'audit_backlog_limit=\d+'
replace: 'audit_backlog_limit={{ rhel9cis_audit_back_log_limit }}'
notify: Grub2cfg
when: "'audit_backlog_limit=' in rhel9cis_4_1_1_3_grub_cmdline_linux.stdout"
- name: "4.1.1.3 | PATCH | Ensure audit_backlog_limit is sufficient | Add audit_backlog_limit setting if missing"
ansible.builtin.lineinfile:
path: /etc/default/grub
regexp: '^GRUB_CMDLINE_LINUX='
line: '{{ rhel9cis_4_1_1_3_grub_cmdline_linux.stdout }} audit_backlog_limit={{ rhel9cis_audit_back_log_limit }}"'
notify: Grub2cfg
when: "'audit_backlog_limit=' not in rhel9cis_4_1_1_3_grub_cmdline_linux.stdout"
- name: "4.1.1.3 | AUDIT | Ensure audit_backlog_limit is sufficient | Grubby update, if needed"
ansible.builtin.shell: grubby --update-kernel=ALL --args="audit_backlog_limit={{ rhel9cis_audit_back_log_limit }}"
when:
- rhel9cis_4_1_1_2_grubby_curr_value_audit_linux is not defined or rhel9cis_4_1_1_2_grubby_curr_value_audit_linux.stdout | int < rhel9cis_audit_back_log_limit
when:
- rhel9cis_rule_4_1_1_3
tags: