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All labs/google-ctf-2024-desfunctional

Crypto

Google CTF 2024: desfunctional

A Triple DES (CBC) server that hands out an encrypted challenge and decrypts your ciphertexts with a key that gets more corrupted bits on every query. Send back the challenge plaintext to get the flag.

Not startedDockercommit be0ddf3x86_64 · aarch64Secret

Objective

Retrieve the flag from the challenge service.

The brief for this lab lives in its repository.

Submit evidenceSecret

Launch the lab

Open it in the Cyber CTF launcher, or run it yourself with Docker Compose.

Open in the launcher Source code

›Run it manually

$git clone https://github.com/CyberCTF/google-ctf-2024-desfunctional && cd google-ctf-2024-desfunctional && docker compose up -d

Without the launcher, the lab uses its public development evidence: great for practice, but it won't complete the lab.

Details

Category: Crypto
Difficulty: Hard
Evidence: Secret
Runtime: Docker
Runs on: x86_64, aarch64
Commit: be0ddf3
Repository: CyberCTF/google-ctf-2024-desfunctional