Even if you take the necessary precautions to ensure that your dependencies and code are free from known vulnerabilities, there still exists an area that can compromise your security strategy. All applications need an execution environment and this can mean either a container, VMs, or an operating system. Sometimes, this can also mean the underlying infrastructure as well.
It's not enough to make your application hardened to the maximum when the operating system it runs on has open access. This way, instead of targeting your application, the attacker can gain unauthorized access to the data directly from the system or infrastructure level.
This section will focus on some techniques of hardening that you can apply at this lowest level of execution.
