1.1.5 Ensure noexec option set on /tmp partition


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


Since the /tmp filesystem is only intended for temporary file storage, set this option to ensure that users cannot run executable binaries from /tmp .


Run the following command to remount /tmp :

# mount -o remount,noexec /tmp

/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