CYDES 2025: note(ify)

TL;DR

Challenge Overview

Debugging

Stage 1: Heap Leak

Stage 2: Double Free

Stage 3: Tcache Poisoning

Solution

solve.py

#!/usr/bin/env python3

References

Heap exploitation, glibc internals and nifty tricks. - Quarkslab's blogblog.quarkslab.com

picoCTF 2019: Heap Exploitation Challenges (Glibc 2.23, 2.27, 2.29)faraz.faith

GlacierCTF 2022 (Heap — Fastbin Dup)Medium