Summary

This is a detailed writeup for the “IFUCKUP” challenge at the DEF CON CTF 2023 Qualifiers that I solved together with several team members from Norsecode (a collaboration of several CTF teams, including Kalmarunionen). The challenge binary that had to be exploited permits a buffer overflow on the …

Solved by: zzz, Zopazz

Writeup by: Zopazz

Description:

Automated reversing is a solved problem, right.

Writeup

General challenge information

In this challenge we were provided with a netcat session, which would respond with one of 20 random dynamically generated shellcodes encoded as hex.

The session would then prompt …