cis-ubuntu2004-v300-3-1-2

name	cis-ubuntu2004-v300-3-1-2
description	Ensure wireless interfaces are not available
category	cis-networking
version	3.0.0
author	cyberstrike-official
tags	["cis","ubuntu","linux","ubuntu-20.04","network"]
cis_id	3.1.2
cis_benchmark	CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0
tech_stack	["ubuntu","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

3.1.2 Ensure wireless interfaces are not available (Automated)

Profile

• Level 1 - Server

Description

Wireless networking is used when wired networks are unavailable.

Rationale

-IF- wireless is not to be used, wireless devices can be disabled to reduce the potential attack surface.

Impact

Many if not all laptop workstations and some desktop workstations will connect via wireless requiring these interfaces be enabled.

Audit Procedure

Command Line

Run the following script to verify no wireless interfaces are active on the system:

#!/usr/bin/env bash

{
  l_output="" l_output2=""
  module_chk()
  {
      # Check how module will be loaded
      l_loadable="$(modprobe -n -v "$l_mname")"
      if grep -Pq -- '^\h*install \\/bin\\/(true|false)' <<< "$l_loadable"; then
          l_output="$l_output\n - module: \"$l_mname\" is not loadable: \"$l_loadable\""
      else
          l_output2="$l_output2\n - module: \"$l_mname\" is loadable: \"$l_loadable\""
      fi
      # Check is the module currently loaded
      if ! lsmod | grep "$l_mname" > /dev/null 2>&1; then
          l_output="$l_output\n - module: \"$l_mname\" is not loaded"
      else
          l_output2="$l_output2\n - module: \"$l_mname\" is loaded"
      
      
       modprobe --showconfig | grep -Pq -- ; 
          l_output=
      
          l_output2=
      
  }
   [ -n  ]; 
      l_dname=$( driverdir  $(find /sys/class/net/*/ - d -name wireless | xargs -0 ); 
 ; |  -u)
       l_mname  ; 
          module_chk
      
  
  
   [ -z  ]; 
       -e 
       [ -z  ]; 
           -e 
      
           -e 
      
  
       -e 
      [ -n  ] &&  -e 
  
}