Description
The startup TypeWriters & Co. had a brilliant idea: they want to offer an online word processing service that will revolutionize the world of publishing!
But on the eve of the inauguration, the project manager recalls a vague mention of security requirements…
As you are the person in charge of security, he needs your validation. According to him, this is just a formality because the code has been reviewed by their best developers, and the binary runs with all the classic protections (stack cookies, W^X, ASLR, etc.).
Check whether one can read the file flag.txt located on the remote server.
A more complex variant of this challenge is available here: Book Writer.
Files
- docker-compose.yml
-
book-writer-easy
16.31 KiB – c5938901f261e9b915d4e76b3a64e07d37784a3a3b080c4e5158e5c4bc1a5904 -
book-writer-easy.c
4.44 KiB – 701da0ebaf1bf44f0d627bfeb94ee6c3e5328e07a9a24af98960080257dc6b83
Author
Challenge Instructions
- First, download docker-compose.yml:
curl https://hackropole.fr/challenges/fcsc2024-pwn-book-writer-easy/docker-compose.public.yml -o docker-compose.yml - Launch the challenge by executing in the same folder:
docker compose up - Then, in another console, access the challenge with Netcat:
nc localhost 4000
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.