SLEM 5 must disable the USB mass storage kernel module.

Without identifying 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.

Verify SLEM 5 does not automount USB mass storage devices when connected to the host with the following command:

     > grep usb-storage /etc/modprobe.d/50-blacklist.conf
     blacklist usb-storage

If the line is commented out or the line is missing, this is a finding.

Configure SLEM 5 to prevent USB mass storage devices from automounting when connected to the host.

Add or modify the following line in the "/etc/modprobe.d/50-blacklist.conf" file:

blacklist usb-storage