Breakout

If you can issue commands to the Docker daemon from inside a container, think about what a new container could do that the current one can't. Consider what happens when you give a new container visibility into the host filesystem.

Before trying to break a technology, it is important to understand it, and one of the fundamental skills of an ethical hacking professional is knowing how to do it on your own. As it is a challenge of medium difficulty, privilege escalation is based on one of the most common cases that is almost a low hanging fruit involving the technology in question.