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.

• https://workbench.cisecurity.org/files/3468

This security hardening control applies to the following category of controls within NIST 800-53: Access Control, Configuration Management, Identification and Authentication, Media Protection.This control applies to the following type of system Unix.

References

• 800-53|AC-3
• 800-53|CM-1
• 800-53|CM-2
• 800-53|CM-6
• 800-53|CM-7
• 800-53|IA-5
• 800-53|MP-2
• CSCv7|5.1
• CSCv7|13

Source

• Tenable.com/audits