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Disable Kernel iwlwifi Module

An XCCDF Rule

Description

To configure the system to prevent the iwlwifi kernel module from being loaded, add the following line to the file /etc/modprobe.d/iwlwifi.conf: 

install iwlwifi /bin/true
To configure the system to prevent the iwlwifi from being used, add the following line to file /etc/modprobe.d/iwlwifi.conf: 
blacklist iwlwifi

Rationale

If Wireless functionality must be disabled, preventing the kernel from loading the kernel module provides an additional safeguard against its activation.

ID
xccdf_org.ssgproject.content_rule_kernel_module_iwlwifi_disabled
Severity
Medium
References
Updated



Remediation - Kubernetes Patch

---
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
spec:
  config:
    ignition:

Remediation - Shell Script

# Remediation is applicable only in certain platforms
if [ ! -f /.dockerenv ] && [ ! -f /run/.containerenv ]; then

if LC_ALL=C grep -q -m 1 "^install iwlwifi" /etc/modprobe.d/iwlwifi.conf ; then
	
	sed -i 's#^install iwlwifi.*#install iwlwifi /bin/true#g' /etc/modprobe.d/iwlwifi.conf

Remediation - Ansible

- name: Ensure kernel module 'iwlwifi' is disabled
  lineinfile:
    create: true
    dest: /etc/modprobe.d/iwlwifi.conf
    regexp: install\s+iwlwifi
    line: install iwlwifi /bin/false