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Disable ATM Support

An XCCDF Rule

Description

The Asynchronous Transfer Mode (ATM) is a protocol operating on network, data link, and physical layers, based on virtual circuits and virtual paths. To configure the system to prevent the atm kernel module from being loaded, add the following line to the file /etc/modprobe.d/atm.conf:
install atm /bin/false

Rationale

Disabling ATM protects the system against exploitation of any flaws in its implementation.

ID
xccdf_org.ssgproject.content_rule_kernel_module_atm_disabled
Severity
Medium
References
Updated

Remediation Templates

A Kubernetes Patch

apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
spec:
  config:
    ignition:
      version: 3.1.0

A Shell Script

# Remediation is applicable only in certain platforms
if rpm --quiet -q kernel; then
if LC_ALL=C grep -q -m 1 "^install atm" /etc/modprobe.d/atm.conf ; then
	
	sed -i 's#^install atm.*#install atm /bin/false#g' /etc/modprobe.d/atm.conf
else

An Ansible Snippet

- name: Gather the package facts
  package_facts:
    manager: auto
  tags:
  - CCE-84137-9
  - DISA-STIG-RHEL-09-213045