cheapolata

pwn x86/x64 heap FCSC 2024 solved on

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Description

You need to read the file flag.txt on the remote server.

Files

  • docker-compose.yml
  • cheapolata
    12.78 KiB – fa1883d4b417b833959d5f4d6bab1371b9f92cff58a0064c68f1df66ccd5b107
  • cheapolata.c
    2.73 KiB – 58e4b775caa90e152bc4a60a7646e265478c7d08d457900a7a2fb07141384ce8
  • ld-2.27.so
    166.95 KiB – 2d196bc8632e500316fa0e0c3e8f40d0e7da853ae940805080b3492ce03b7b51
  • libc-2.27.so
    1.94 MiB – cd7c1a035d24122798d97a47a10f6e2b71d58710aecfd392375f1aa9bdde164d

Author

Cryptanalyse

Challenge Instructions

  1. First, download docker-compose.yml:
    curl https://hackropole.fr/challenges/fcsc2024-pwn-cheapolata/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.

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Writeups

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