V-251505

Discussion

Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Peripherals include, but are not limited to, such devices as flash drives, external storage, and printers.

Check Content

Verify that Ubuntu operating system disables ability to load the USB storage kernel module.

# grep usb-storage /etc/modprobe.d/* | grep "/bin/false" 

install usb-storage /bin/false

If the command does not return any output, or the line is commented out, this is a finding.

Verify the operating system disables the ability to use USB mass storage device.

# grep usb-storage /etc/modprobe.d/* | grep -i "blacklist"

blacklist usb-storage

If the command does not return any output, or the line is commented out, this is a finding.