1.1.16 Ensure nosuid option set on /dev/shm partition

Information

The nosuidmount option specifies that the filesystem cannot contain setuid files.

Rationale:

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

Solution

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,nosuid /dev/shm

See Also

https://workbench.cisecurity.org/files/2619

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6, CSCv7|5.1

Plugin: Unix

Control ID: 9f71ac3c5d017c87832b3b5d2d2d7b7f3aafbf46cecd906f11cbeda6e673820d