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by kafrofrite 992 days ago
> I don't think OS becomes any less vulnerable than usual Linux/Windows installation.

is not a good enough argument.

For the story, SIP is Apple's "rootless". Effectively the OS runs with less privileges than root. Disabling SIP significantly increases the attack surface.

That being said, I'm grateful that someone decided to do something more native for containers in macOS.
1 comments
insanitybit 992 days ago
I think it's an OK argument given that most people run (and have been running with no alternative until very recently) docker in such a way that there's a trivial privesc to root. In general it seems like docker users are, overall, willing to take that tradeoff.
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dartos 992 days ago
How so? I use docker pretty frequently, but I’m sure that my user is part of the docker group before I do, so I don’t sudo anything.

Is there anything else I should be doing security wise?

I’ve been hearing podman is more secure, but I think it’s still containerd under the hood, so idk how true that is.

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insanitybit 992 days ago
In general if you can `docker run` without sudo then that means you have a trivial privesc path since you can do `docker run` with the various flags that run it without any sandboxing, get a shell, and just ask to be let out of the namespace.

The way that podman and newer versions of docker get around this is using unprivileged user namespaces. Unprivileged user namespaces are not a free lunch - in fact, they're a bit of a security disaster in their own right.

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aflukasz 992 days ago
In a typical installation, being in a docker group gives you access to a socket that controls docker daemon and that daemon runs as root. `sudo` is not important in this context.

Thankfully there is rootless mode for some time now: https://docs.docker.com/engine/security/rootless/.

Podman, too, can run in rootful and rootless mode. Rootless in podman still feels to me to be more like first class citizen, as opposed to docker case.

In both cases it's important to keep in mind in which mode you operate. Both from the perspective of security and day to day operations, as some aspects of behavior will differ between those modes.

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