The Bluetooth kernel module must be disabled.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-219578 | OL6-00-000315 | SV-219578r793835_rule | Medium |
| Description |
|---|
| If Bluetooth functionality must be disabled, preventing the kernel from loading the kernel module provides an additional safeguard against its activation. |
| STIG | Date |
|---|---|
| Oracle Linux 6 Security Technical Implementation Guide | 2021-12-03 |
Details
| Check Text ( C-21303r358274_chk ) |
|---|
| If the system is configured to prevent the loading of the "bluetooth" kernel module, it will contain lines inside any file in "/etc/modprobe.d" or the deprecated"/etc/modprobe.conf". These lines instruct the module loading system to run another program (such as "/bin/true") upon a module "install" event. Run the following command to search for such lines in all files in "/etc/modprobe.d" and the deprecated "/etc/modprobe.conf": $ grep -r bluetooth /etc/modprobe.conf /etc/modprobe.d | grep -i “/bin/true” If no line is returned, this is a finding. If the system is configured to prevent the loading of the "net-pf-31" kernel module, it will contain lines inside any file in "/etc/modprobe.d" or the deprecated"/etc/modprobe.conf". These lines instruct the module loading system to run another program (such as "/bin/true") upon a module "install" event. Run the following command to search for such lines in all files in "/etc/modprobe.d" and the deprecated "/etc/modprobe.conf": $ grep -r net-pf-31 /etc/modprobe.conf /etc/modprobe.d | grep -i “/bin/true” If no line is returned, this is a finding. |
| Fix Text (F-21302r358275_fix) |
|---|
| The kernel's module loading system can be configured to prevent loading of the Bluetooth module. Add the following to the appropriate "/etc/modprobe.d" configuration file to prevent the loading of the Bluetooth module: install net-pf-31 /bin/true install bluetooth /bin/true |