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UBTU-22-291010 Ubuntu 22.04 LTS must disable automatic mounting of Universal Serial Bus (USB) mass storage driver.

DISA STIG library V2R10
All changes in this version
first version loaded CAT II

Maps to CM-7(9), IA-3 via CCI-001958, CCI-003959

Title

Ubuntu 22.04 LTS must disable automatic mounting of Universal Serial Bus (USB) mass storage driver.

Control

Verify Ubuntu 22.04 LTS disables ability to load the USB storage kernel module by using the following command: $ grep usb-storage /etc/modprobe.d/* | grep "/bin/false" /etc/modprobe.d/stig.conf:install usb-storage /bin/false If the command does not return any output, or the line is commented out, this is a finding. Verify Ubuntu 22.04 LTS disables the ability to use USB mass storage device. $ grep usb-storage /etc/modprobe.d/* | grep -i "blacklist" /etc/modprobe.d/stig.conf:blacklist usb-storage If the command does not return any output, or the line is commented out, this is a finding.

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.

Related controls

CCI-001958, CCI-003959

Fix

Configure Ubuntu 22.04 LTS to disable using the USB storage kernel module. Create and/or append a custom file under "/etc/modprobe.d/" to contain the following: $ sudo su -c "echo install usb-storage /bin/false >> /etc/modprobe.d/stig.conf" Configure Ubuntu 22.04 LTS to disable the ability to use USB mass storage devices. $ sudo su -c "echo blacklist usb-storage >> /etc/modprobe.d/stig.conf"