OL 9 must be configured to disable USB mass storage.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-271450	SRG-OS-000114-GPOS-00059	OL09-00-000047	SV-271450r1092466_rule	2025-05-08	1

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 that OL 9 disables the ability to load the USB Storage kernel module with the following command: $ grep -r usb-storage /etc/modprobe.conf /etc/modprobe.d/* install usb-storage /bin/false 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 that OL 9 disables the ability to load the USB Storage kernel module with the following command: $ grep -r usb-storage /etc/modprobe.conf /etc/modprobe.d/* install usb-storage /bin/false 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 OL 9 to prevent the usb-storage kernel module from being loaded. Add the following line to the file /etc/modprobe.d/usb-storage.conf (or create usb-storage.conf if it does not exist): install usb-storage /bin/false blacklist usb-storage