Playing with Python Pickle #2

This post demonstrates practical exploitation of Python's pickle deserialization to execute arbitrary system commands and read files on hosts that unpickle attacker-controlled data. It walks through opcode-level pickle payloads and techniques (os.system, subprocess.check_output, and __builtin__.apply/getattr) showing how to retrieve command output and file contents (e.g., /etc/passwd) and warns that Python's pickle performs no security checks, making untrusted unpickling dangerous.