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this post was submitted on 02 Nov 2023
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Defense in depth. If something escapes the container it's limited to only what's under that user and not the whole system. Having access to the whole system makes it easier for malware to hide/persist itself.
Correct me if I'm wrong but containerization is enforced by the kernel, correct? If something escapes you're pretty much screwed anyway.
There are many layers involved in preventing escapes from containers.
Way too dependent on the setup, a container with absolutely no outside access theoretically just has the kernel, but usually we want to communicate with our docker images not just run them