pwn2.py

#!/usr/bin/python3
import sys, cmd, os

del __builtins__.__dict__['__import__']
del __builtins__.__dict__['eval']

intro = """
Welcome to Secure Python Interpreter 
================================================

Rules:
    -Do not import anything
    -No peeking at files!
    -No sharing of flags :)

"""


def execute(command):
       exec(command, globals())
 
class Jail(cmd.Cmd):
 
    prompt     = '>>> '
    filtered    = '\'|.|input|if|else|eval|exit|import|quit|exec|code|const|vars|str|chr|ord|local|global|join|format|replace|translate|try|except|with|content|frame|back'.split('|')
 
    def do_EOF(self, line):
        sys.exit()
 
    def emptyline(self):
        return cmd.Cmd.emptyline(self)
 
    def default(self, line):
        sys.stdout.write('\x00')
 
    def postcmd(self, stop, line):
        if any(f in line for f in self.filtered):
            print("Do you think my code is so insecure ?")
            print("You can never get out of my jail :)")
        else:
           try:
                execute(line)
           except NameError:
                print("NameError: name '%s' is not defined" % line)
           except Exception:
                print("Error: %s" % line)
        return cmd.Cmd.postcmd(self, stop, line)
 
if __name__ == "__main__":
    try:
        Jail().cmdloop(intro)
    except KeyboardInterrupt:
        print("\rBye bye !")