this post was submitted on 26 Dec 2024
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Privacy
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Docker guest still shares a kernel with host. Use a custom OCI runtimes like kata-containers (VM) or gVisor/sydbox-oci (unprivileged application kernel) to reduce the kernel attack surface and protect against privelege escalation.
This is true.
However, I'm running trusted software, not the backyard efforts of someone randomly selected off the internet.
Additionally, the Docker container is running on a dedicated Debian virtual machine with only Docker installed.
What's of deeper concern is that all instances are running on X11 which means that they all share information via the clipboard for example.
You could set up Wayland probably. Just make sure you use GNOME (Mutter) since it is the only Wayland DE that protects the screencopy API.
So far the Wayland implementation requires embedded X11 which puts everything in the same environment again.
I've not yet discovered how to run separate Wayland screens across the network from a Docker container and I'm also not sure if either Chrome or Firefox actually support native Wayland, from memory they didn't last time I checked.
Both Firefox and Chromium support native Wayland.
Also, this might lead you in the right direction for remote Wayland apps: https://github.com/wayland-transpositor/wprs