Tag: python

ihuomtia's blog

2 items with this tag.

Hijacking Python Object Internals for Code Execution | DUCTF fakeobj.py

Exploiting Python object internals to hijack the __repr__ function pointer, redirecting execution to system("/bin/sh") for a shell, with adjustments for version-specific memory layouts.

Jul 21, 2025

Patching Python to Defeat Anti-Tampering | UofTCTF Py_FlagChecker

Extracting and defeating a self-referential Python flag checker that uses version-specific marshal bytecode and anti-tampering keys by building a custom Python 3.10.12 interpreter with added debug prints to reveal the decrypted flag.

Jan 13, 2025

ctf writeup rev