1.1.7 Ensure noexec option set on /var partition


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


Since the /var filesystem is only intended for services to write data and not execute, set this option to ensure that users cannot run executable binaries from /var.


Run the following command to remount /var :

# mount -o remount,noexec /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