Diplodocus (Harder)

reverse algo linux x86/x64 FCSC 2022 solved on

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Description

Find an input that displays the success message, then submit it to the remote verification service to grab the flag.

Note: this version patches a bug that was present in the previous one. The simpler variant of this challenge is available here: Diplodocus.

Files

Author

Cryptanalyse

Challenge Instructions

  1. First, download docker-compose.yml:
    curl https://hackropole.fr/challenges/fcsc2022-reverse-diplodocus-harder/docker-compose.public.yml -o docker-compose.yml
  2. Launch the challenge by executing in the same folder:
    docker compose up
  3. Then, in another console, access the challenge with Netcat:
    nc localhost 4000
⚠️ Important: You must solve the challenge by interacting with the Docker container through the exposed network port. Any other way is not considered valid.

In case you encounter problems, please consult the FAQ.

Flag

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Writeups

There are no public solutions for this challenge yet, but you can submit yours after getting the flag.