1.1.10 Disable USB Storage - lsmod

Information

USB storage provides a means to transfer and store files insuring persistence and availability of the files independent of network connection status. Its popularity and utility has led to USB-based malware being a simple and common means for network infiltration and a first step to establishing a persistent threat within a networked environment.

Rationale:

Restricting USB access on the system will decrease the physical attack surface for a device and diminish the possible vectors to introduce malware.

Solution

Edit or create a file in the /etc/modprobe.d/ directory ending in .conf
Example: vim /etc/modprobe.d/usb_storage.conf
and add the following line:

install usb-storage /bin/true

Run the following command to unload the usb-storage module:

rmmod usb-storage

Additional Information:

An alternative solution to disabling the usb-storage module may be found in USBGuard.

Use of USBGuard and construction of USB device policies should be done in alignment with site policy.

See Also

https://workbench.cisecurity.org/files/3742

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-18(4), CSCv7|13.7

Plugin: Unix

Control ID: 43e7c6ab218ad0e8731bcc67ee77b144241157b9236a5c183e14e1dcad02ce95