SV-258039r1262150: RHEL 9 Bluetooth must be disabled. | Red Hat Enterprise Linux 9 STIG SCAP Benchmark

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Assessment Title

Rule Text

RHEL 9 Bluetooth must be disabled.

Description

Discussion Text

This requirement applies to wireless peripheral technologies (e.g., wireless mice, keyboards, displays, etc.) used with RHEL 9 systems. Wireless peripherals (e.g., Wi-Fi/Bluetooth/IR keyboards, mice and pointing devices, and near field communications [NFC]) present a unique challenge by creating an open, unsecured port on a computer. Wireless peripherals must meet DoW requirements for wireless data transmission and be approved for use by the Authorizing Official (AO). Even though some wireless peripherals, such as mice and pointing devices, do not ordinarily carry information that need to be protected, modification of communications with these wireless peripherals may be used to compromise the RHEL 9 operating system. Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000300-GPOS-00118

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000381Not mappedCCI-001443

References

DPMS Target Red Hat Enterprise Linux 9 DISA DPMS Target Red Hat Enterprise Linux 9 5551

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

#!/bin/bash
# Reconstructed from oval:mil.disa.stig.rhel9os:def:258039
# RHEL 9 Bluetooth must be disabled.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# /etc/modprobe.d contains a file that contains 'install bluetooth /bin/false'
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  grep -rqP --include='*' '^[ \t]*install[ \t]+bluetooth[ \t]+/bin/false[ \t]*$' '/etc/modprobe.d' &>/dev/null
}
# /etc/modprobe.d contains a file that contains 'blacklist bluetooth'
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  grep -rqP --include='*' '^[ \t]*blacklist[ \t]+bluetooth[ \t]*$' '/etc/modprobe.d' &>/dev/null
}

if ( test_1 && test_2 ); then
  echo "PASS"
else
  echo "FAIL"
fi

Assessment Script Powered by AISandbox-executed

A standalone Shell script to assess this control automatically. Review before running it in your environment.

Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.

#!/bin/sh
# OVAL Definition: oval:mil.disa.stig.rhel9os:def:258039

if [ ! -d "/etc/modprobe.d" ]; then echo "PASS"; exit 0; fi
if [ -f "/etc/modprobe.d/bluetooth.conf" ]; then
    if [ "$(grep -E "^[ \t]*install[ \t]+bluetooth[ \t]+/bin/false[ \t]*$" /etc/modprobe.d/bluetooth.conf | wc -l)" -ge "1" ] && \
       [ "$(grep -E "^[ \t]*blacklist[ \t]+bluetooth[ \t]*$" /etc/modprobe.d/bluetooth.conf | wc -l)" -ge "1" ]; then
        echo "PASS"; exit 0;
    fi
fi
echo "FAIL"; exit 1

Remediation

Configure RHEL 9 to disable the Bluetooth adapter when not in use.

Create or modify the "/etc/modprobe.d/bluetooth.conf" file with the following lines:

install bluetooth /bin/false
blacklist bluetooth

Reboot the system for the settings to take effect.