OL 8 must not have the Controller Area Network (CAN) kernel module installed if not required for operational support.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-248830 | OL08-00-040022 | SV-248830r991589_rule | CCI-000366 | medium |
| Description | ||||
| The CAN protocol is a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other's applications without a host computer. Disabling CAN protects the system against exploitation of any flaws in its implementation. | ||||
| STIG | Date | |||
| Oracle Linux 8 Security Technical Implementation Guide | 2025-05-13 | |||
Related Frameworks
4 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
CM-6
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1712 mappings
3.4.1
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
3.4.2
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-000366
1.00
- DISA · 2 · disa_xccdf · related
Details
Check Text (C-248830r991589_chk)
Verify the operating system disables the ability to load the "can" kernel module.
$ sudo grep -r can /etc/modprobe.d/* | grep -i "/bin/false" | grep -v "^#"
install can /bin/false
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.
Verify the operating system disables the ability to use CAN with the following command:
$ sudo grep can /etc/modprobe.d/* | grep -i "blacklist" | grep -v "^#"
blacklist can
If the command does not return any output or the output is not "blacklist can", and use of CAN is not documented with the ISSO as an operational requirement, this is a finding.
Fix Text (F-52218r943073_fix)
Configure OL 8 to disable the ability to use the "can" kernel module.
Create a file under "/etc/modprobe.d" with the following command:
$ sudo touch /etc/modprobe.d/can.conf
Add the following line to the created file:
install can /bin/false
Configure OL 8 to disable the ability to use the can kernel module.
$ sudo vi /etc/modprobe.d/blacklist.conf
Add or update the line:
blacklist can