1337 Local CTF - Reverse Engineering

• Date: [27 - 06 - 2026]

This repository contains the reverse engineering challenges I authored for the 1337 Local CTF competition.

Challenges:

Challenge Name	Description / Topic
big_brother	simulation of a privilege escalation via traffic-control pedit COW vulnerability (CVE-2026-46331).
dirty_ptrace	User-space simulation of Samsung Exynos driver Use-After-Free via dirty ptrace (CVE-2024-44068).
glitched_colosseum	Game Boy Advance (.gba) ROM reverse engineering.
minishell	Custom shell binary analysis.
moulcyber	Process injection detection bait with modular linear equation checks.
videur	Custom VM / interpreter reversing inside a Linux initramfs cpio archive.
zrbaan	Multi-process IPC with timing-sensitive metronome anti-debugging gates.

More info:

Each directory contains the distributed challenge files. To run or analyze them locally:

1. Navigate to the specific challenge directory.
2. Ensure you have the appropriate architectures and libraries set up (e.g., standard Linux tooling, GBA emulators for glitched_colosseum).
3. Make binaries executable if necessary: chmod +x <binary>

notes:

• For the CVE-based challenges (big_brother and dirty_ptrace), i designed the challenges to simulate the core mechanics as much as possible.

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Authored by Jst3r