1.1.17 Ensure noexec option set on /dev/shm partition

Information

The noexec mount option specifies that the filesystem cannot contain executable binaries.

Rationale:

Setting this option on a file system prevents users from executing programs from shared memory. This deters users from introducing potentially malicious software on the system.

Solution

Edit the /etc/fstab file and add noexec 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 /dev/shm

See Also

https://workbench.cisecurity.org/files/3738

Item Details

Category: ACCESS CONTROL, MEDIA PROTECTION

References: 800-53|AC-3, 800-53|AC-5, 800-53|AC-6, 800-53|MP-2, CSCv7|2.6, CSCv7|13

Plugin: Unix

Control ID: 28e6064a57974c554d6feb581d8f21138f91e2d2d9e057a89ca914d78acf6152