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V-282475

CAT II (Medium)

TOSS 5 must be configured to disable the Controller Area Network (CAN) kernel module.

Rule ID

SV-282475r1200405_rule

STIG

Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000381

Discussion

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

Check Content

Verify TOSS 5 disables the ability to load the "CAN" kernel module using the following command:

$ sudo grep -r can /etc/modprobe.conf /etc/modprobe.d/* 

blacklist can

If the command does not return any output, or the line is commented out, and use of CAN is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.

Fix Text

Configure the system to prevent the "CAN" kernel module from being loaded by adding the following line to the file /etc/modprobe.d/can.conf (or create atm.conf if it does not exist):

install can /bin/false
blacklist can