It's my favorite show to watch while practicing my python skills! I've seen episode 5 at least 13 times.
nc pwn.tamuctf.com 8448
Difficulty: easy-medium
2.23 1:58 pm CST: Added hint to description
So if you look at the episode no. 5 you see pickle intending us to check for pickle vulnerability
When you see the pickle documentation:
Warning The pickle module is not secure against erroneous or maliciously constructed data. Never unpickle data received from an untrusted or unauthenticated source.
So on searching for exploiting vulnerablity we found a link
we wrote a script based on that
Don't try to test it locally as it messes.You know the warning as well.