D0cker

I have heard that Docker may not be the greatest isolation tool. Can you proove it?

Hints:

This is not a kernel exploitation challenge
You don't need to exploit the oracle

nc docker-ams3.nc.jctf.pro 1337
nc docker-nyc3.nc.jctf.pro 1337
nc docker-sgp1.nc.jctf.pro 1337
nc docker-ams32.nc.jctf.pro 1337
nc docker-nyc32.nc.jctf.pro 1337