Puppet Class: cis_security_hardening::rules::disable_can

Defined in:
manifests/rules/disable_can.pp

Summary

Ensure CAN is disabled

Overview

The operating system must disable the controller area network (CAN) protocol.

Rationale: It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors.

Failing to disconnect unused protocols can result in a system compromise.

The Controller Area Network (CAN) is a serial communications protocol, which was initially developed for automotive and is now also used in marine, industrial, and medical applications. Disabling CAN protects the system against exploitation of any flaws in its implementation.

Examples:

class { 'cis_security_hardening::rules::disable_can':
  enforce => true,
}

Parameters:

  • enforce (Boolean) (defaults to: false) —

    Enforce the rule.



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# File 'manifests/rules/disable_can.pp', line 26

class cis_security_hardening::rules::disable_can (
  Boolean $enforce = false,
) {
  if $enforce {
    kmod::install { 'CAN':
      command => '/bin/true',
    }
    kmod::blacklist { 'CAN': }
  }
}