1.1.8 Ensure nodev option set on /dev/shm partition

Information

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

Note: /dev/shm is mounted automatically by systemd. /dev/shm needs to be added to /etc/fstab to add mount options even though it is already being mounted on boot.

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,noexec,nodev,nosuid /dev/shm

See Also

https://workbench.cisecurity.org/files/2925

Item Details

Category: CONFIGURATION MANAGEMENT, SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|CM-6, 800-53|SC-7(10), CSCv7|5.1, CSCv7|13

Plugin: Unix

Control ID: d37980edba058f89ca3ce69874b77ac0b71ddd7e43d8f34fca45c64e39efc976