1.1.16 Ensure nosuid option set on /dev/shm partition


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.


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


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