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

Edit the /etc/fstab file and add nodev to the fourth field (mounting options) for the /var/tmp partition. See the fstab(5) manual page for more information.
Run the following command to remount /var/tmp :

# mount -o remount,nosuid,nodev,noexec /var/tmp

Supportive Information

The following resource is also helpful.

• https://workbench.cisecurity.org/files/3219https://workbench.cisecurity.org/files/3219

This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management.This control applies to the following type of system Unix.

References

• 800-53|CM-6
• CSCv7|5.1

Source

• Tenable.com/audits