GEN008480 - The system must have USB Mass Storage disabled unless needed.

Information

USB is a common computer peripheral interface. USB devices may include storage devices with the potential to install malicious software on a system or exfiltrate data

Solution

Prevent the usb-storage module from loading.
# echo 'install usb-storage /bin/true' >> /etc/modprobe.conf

See Also

http://iasecontent.disa.mil/stigs/zip/U_RedHat_5_V1R18_STIG.zip