1.1.15 Ensure nosuid option set on /dev/shm partition (Scored)

Level 1 - Server 
Level 1 - Workstation

The nosuid mount option specifies that the filesystem cannot contain setuid files.

Setting this option on a file system prevents users from introducing privileged programs onto the system and allowing non-root users to execute them.

Run the following command and verify that the nosuid option is set on /dev/shm.

# mount | grep /dev/shm 
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime)

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

# mount -o remount,nodev /dev/shm