The Ubuntu operating system must disable automatic mounting of Universal Serial Bus (USB) mass storage driver.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-251505 | UBTU-20-010461 | SV-251505r958820_rule | Medium |
| Description |
| 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. |
| STIG | Date |
| Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide | 2024-08-22 |
Details
| Check Text (C-54940r942849_chk) |
| 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. |
| Fix Text (F-54894r942850_fix) |
| Configure the Ubuntu operating system to disable using the USB storage kernel module. Create a file under "/etc/modprobe.d" to contain the following: # sudo su -c "echo install usb-storage /bin/false >> /etc/modprobe.d/DISASTIG.conf" Configure the operating system to disable the ability to use USB mass storage devices. # sudo su -c "echo blacklist usb-storage >> /etc/modprobe.d/DISASTIG.conf" |