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RHEL-09-213050 RHEL 9 must be configured to disable the Controller Area Network kernel module.

DISA STIG library V2R10
All changes in this version
first version loaded CAT II

Maps to CM-7 via CCI-000381

Title

RHEL 9 must be configured to disable the Controller Area Network kernel module.

Control

Verify that RHEL 9 disables the ability to load the CAN kernel module with the following command: $ grep -r can /etc/modprobe.conf /etc/modprobe.d/* install can /bin/false blacklist can If the command does not return any output, or the lines are commented out, and use of CAN is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.

Discussion

Disabling Controller Area Network (CAN) protects the system against exploitation of any flaws in its implementation.

Related controls

CCI-000381

Fix

To configure the system to prevent the can kernel module from being loaded, add the following lines to the file /etc/modprobe.d/can.conf (or create can.conf if it does not exist): install can /bin/false blacklist can