1.1.3 Ensure nodev option set on /tmp partition

Information

The nodev mount option specifies that the filesystem cannot contain special devices.

Rationale:

Since the /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 /tmp .

Solution

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

# mount -o remount,nodev /tmp

or
Edit /etc/systemd/system/local-fs.target.wants/tmp.mount to add nodev to the /tmp
mount options:

[Mount]
Options=mode=1777,strictatime,noexec,nodev,nosuid

Run the following command to remount /tmp :

# mount -o remount,nodev /tmp,CSCv6|13,CSCv7|5.1

See Also

https://workbench.cisecurity.org/files/2420