zlacker

>>todsac+(OP)
Docker has a known security issue with port exposure in that it punches holes through the firewall without asking your permission, see https://github.com/moby/moby/issues/4737

I usually expose ports like `127.0.0.1:1234:1234` instead of `1234:1234`. As far as I understand, it still punches holes this way but to access the container, an attacker would need to get a packet routed to the host with a spoofed IP SRC set to `127.0.0.1`. All other solutions that are better seem to be much more involved.

>>smarx0+P4
I am not a security person at all. Are you really saying that it could potentially cause Iptables to open ports without an admin's knowing? Is that shockingly, mind-bogglingly bad design on Docker's part, or is it just me?

Worse, the linked bug report is from a DECADE ago, and the comments underneath don't seem to show any sense of urgency or concern about how bad this is.

Have I missed something? This seems appalling.