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The Bluetooth kernel module must be disabled.


Overview

Finding ID Version Rule ID IA Controls Severity
V-38682 RHEL-06-000315 SV-50483r3_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
Red Hat Enterprise Linux 6 Security Technical Implementation Guide 2015-05-26

Details

Check Text ( C-46244r3_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

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

If no line is returned, this is a finding.
Fix Text (F-43631r3_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