1.1.15 Ensure nodev option set on /dev/shm partition

Information

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

Rationale:

Since the /dev/shm filesystem is not intended to support devices, set this option to ensure that users cannot attempt to create special devices in /dev/shm partitions.

Solution

Edit the /etc/fstab file and add nodev 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

Notes:

Some distributions mount /dev/shm through other means and require /dev/shm to be added to /etc/fstab even though it is already being mounted on boot. Others may configure /dev/shm in other locations and may override /etc/fstab configuration. Consult the documentation appropriate for your distribution.

See Also

https://workbench.cisecurity.org/files/2611

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-6(1)

Plugin: Unix

Control ID: edbb92d587e4d9f2ef678d9afd88188d12c9b7d4bc0632191114fe6bec779555