Battle Chip

misc FCSC 2021 solved on

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Description

We set up a slightly modified online CHIP-8 emulator. The documentation is available in attachment (in French).

You need to find and exploit the vulnerability of this architecture to discover the generated secret.

The documentation associated with this challenge is available on this page.

Note: the flag follows the format FCSC{secret.hex().lower()}.

Files

  • docker-compose.yml
  • VM.png
    41.12 KiB – 68029c66ace9889e65bc498ecadc9d6bcb02cae62f82f1e96a21b3d192c9d96e
  • emulator.zip
    7.77 KiB – 77ed83405dac0112e77ac318a9bf167ac44d323139490e3d0972b7fb922601e6

Author

sheidan

Challenge Instructions

  1. First, download docker-compose.yml:
    curl https://hackropole.fr/challenges/fcsc2021-misc-battle-chip/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

I've been looking for a long time and I still can't find the flag!

You can vote for the solutions you prefer by using the on their respective pages.

DateAuthor Language Tags Vote
2023-11-07
face0xff
🇬🇧
TeamFrance
2023-11-16
bluesheet
🇬🇧
TeamFrance