pyjail

Recon

This challenge presents a Python jail escape scenario. After examining the source code, we learn that the task is to craft a Python snippet of fewer than 15 characters that outputs more than 500 characters. Additionally, the snippet may only contain lowercase letters and spaces.

Exploitation

Python has a built-in easter egg that prints The Zen of Python by Tim Peters. Running the command import this will trigger this output. This command adheres to the challenge’s input restrictions and produces a large amount of text.

Flag capture

By simply executing this command, we successfully obtain the flag:

$ nc pyjail.challs.infobahnc.tf 1337
Enter your solution: import this
b'infobahn{Y0u_3Sc4p3D_Th3_J@1lll_4359849084894}\n'