RHEL 8 must be configured to disable USB mass storage.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-230503	SRG-OS-000114-GPOS-00059	RHEL-08-040080	SV-230503r1069316_rule	2025-03-26	2

Description
USB mass storage permits easy introduction of unknown devices, thereby facilitating malicious activity. Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163

ℹ️ Check
Verify the operating system disables the ability to load the USB Storage kernel module and ensure that the USB Storage kernel module is disabled with the following command: $ sudo grep usb-storage /etc/modprobe.d/* \| grep -i "blacklist" /etc/modprobe.d/blacklist.conf:install usb-storage /bin/false /etc/modprobe.d/blacklist.conf:blacklist usb-storage If the command does not return any output, or the line is commented out, and use of USB Storage is not documented with the Information System Security Officer (ISSO) as an operational requirement, this is a finding.

ℹ️ Check

Verify the operating system disables the ability to load the USB Storage kernel module and ensure that the USB Storage kernel module is disabled with the following command: $ sudo grep usb-storage /etc/modprobe.d/* | grep -i "blacklist" /etc/modprobe.d/blacklist.conf:install usb-storage /bin/false /etc/modprobe.d/blacklist.conf:blacklist usb-storage If the command does not return any output, or the line is commented out, and use of USB Storage is not documented with the Information System Security Officer (ISSO) as an operational requirement, this is a finding.

✔️ Fix
Configure the operating system to disable the ability to use the USB Storage kernel module and the ability to use USB mass storage devices. Add or update the following lines in the file "/etc/modprobe.d/blacklist.conf": install usb-storage /bin/false blacklist usb-storage Reboot the system for the settings to take effect.