1.1.6 Ensure nosuid option set on /var partition


The nosuid mount option specifies that the filesystem cannot contain setuid files.


Since the /var filesystem is only intended for temporary dynamic data, set this option to ensure that users cannot create setuid files in /var.


Run the following command to remount /var :

# mount -o remount,nosuid /var

/etc is stateless on Container-Optimized OS. Therefore, /etc cannot be used to make these changes persistent across reboots. The steps mentioned above needs to be performed after every boot.

See Also