Enforce least privileges in runtime

The concept of least privileges is a basic security best practice that also applies to containers. When a vulnerability is exploited, it generally gives the attacker access and privileges equal to those of the compromised application or process. Ensuring that containers operate with the lowest privileges and access required to get the job done reduces your exposure to risk.

Reduce the container attack surface by removing unneeded privileges

You can also minimize the potential attack surface by removing any unused or unnecessary processes or privileges from the container runtime. Privileged containers run as root. If a malicious user or workload escapes in a privileged container, the container will then run as root on that system.

Preapprove files and executables that the container is allowed to access or run

Reducing the number of variables or unknowns helps you maintain a stable, reliable environment. Limiting containers so they can access or run only preapproved or safe listed files and executables is a proven method of limiting exposure to risk.

It’s a lot easier to manage a safe list when it’s implemented from the beginning. A safe list provides a measure of control and manageability as you learn what files and executables are required for the application to function correctly.

A safe list not only reduces the attack surface but can also provide a baseline for anomalies and prevent the use cases of the "noisy neighbor" and container breakout scenarios.


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