runc VS asciinema

I can speak to this. Containers, and by extension k8s, break a well known security boundary that has existed for a very long time - whether you are using a real (hardware) server or a virtual machine on the cloud if you pop that instance/server generally speaking you only have access to that server. Yeh, you might find a db config with connection details if you landed on say a web app host but in general you still have to work to start popping the next N servers.

That's not the case when you are running in k8s and the last container breakout was just announced ~1 month ago: https://github.com/opencontainers/runc/security/advisories/G... .

At the end of the day it is simply not a security boundary. It can solve other problems but not security ones.

It's interesting that, in light of things like this, you still see large software companies adding support for new components written in non-memory safe languages (e.g. C)

As an example Red Hat OpenShift added support for crun(https://github.com/containers/crun) this year(https://cloud.redhat.com/blog/whats-new-in-red-hat-openshift...), which is written in C as an alternative to runc, which is written in Go(https://github.com/opencontainers/runc)...

Rabbit hole indeed. That wasn't related to my job at the time, lol. The job change came with a company-provided computer and that put an end to the tinkering.

BTW, I found my hacks to make runc run on Chromebook: https://github.com/opencontainers/runc/compare/main...gabrys...

being the main author of crun, I can clarify that statement: I am not a fan of Go _for this particular use case_.

Using C instead of Go avoided a bunch of the workarounds that exists in runc to workaround the Go runtime, e.g. https://github.com/opencontainers/runc/blob/main/libcontaine...

runc

Not OP, but if I had to guess, a lot of this can be picked up by just observing common security issues in the Linux space, since similar mistakes and oversights have caused quite a few real-world CVEs in the past, e.g. this random example of a TOCTTOU vulnerability in runc.

> https://github.com/asciinema/asciinema-server

and

> Web player for terminal session recordings

It's not mine, it's asciinema, lol. I tried finding it, but fell short, look around here https://github.com/asciinema/asciinema-server/tree/develop/assets/css.

I've used the script command and asciinema [1] before. Easy way to record steps without missing anything.

[1] https://asciinema.org/

You're welcome! I just stumbled across another one that looks promising, too: https://asciinema.org/

Check out https://asciinema.org, a tool for recording terminal commands.

These days I reluctantly prefer embedding a static screenshot in my READMEs with a link to an asciinema animation. They're easy enough to record, and at least I'm not costing some poor sod who accidentally loaded my page $0.10 to download a giant GIF on mobile data.

I you'd like to know what it is like to use Podman, I've found those Asciinema snippets by Matthew Heon (Podman contributor) quite helpful: https://asciinema.org/~mheon