Vulnerability Discussion

USB mass storage permits easy introduction of unknown devices, thereby facilitating malicious activity.

Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163

Check

Verify the operating system disables the ability to load the USB Storage kernel module.

$ sudo grep -r usb-storage /etc/modprobe.d/* | grep -i "/bin/true" | grep -v "^#"

/etc/modprobe.d/usb-storage.conf:install usb-storage /bin/true

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 8 to disable the ability to use the USB Storage kernel module.

Create a file under "/etc/modprobe.d" with the following command:

$ sudo touch /etc/modprobe.d/usb-storage.conf

Add the following line to the created file:

install usb-storage /bin/true