Details
The nodev mount option specifies that the filesystem cannot contain special devices.
Rationale:
Since the /var/tmp filesystem is not intended to support devices, set this option to ensure that users cannot attempt to create block or character special devices in /var/tmp .
Solution
For existing /var/tmp partitions, edit the /etc/fstab file and add nodev to the fourth field (mounting options) of the /var/tmp entry. See the fstab(5) manual page for more information.
Run the following command to remount /var/tmp:
# mount -o remount,nodev /var/tmp
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: Access Control.This control applies to the following type of system Unix.