RHEL 9 must be configured to disable USB mass storage.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-258034	SRG-OS-000114-GPOS-00059	RHEL-09-291010	SV-258034r1051267_rule	2025-02-27	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, SRG-OS-000480-GPOS-00227

ℹ️ Check
Verify that RHEL 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 either 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 RHEL 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 either 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
To configure the system to prevent the usb-storage kernel module from being loaded, add the following lines 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