GoGOLFplex

Category: Miscellaneous - Points: 990 - Difficulty: Easy - Solves: 111

Description:

Alors que vous êtes infiltré dans le repaire de Hallebarde, un des membres vous tend un jeu éléctronique qu'il a créé. Il vous met au défi de le battre. Il promet une belle récompense ! nc challenge.404ctf.fr 32697

Solution:

To solve this challenge, you need to exploit a flaw in the python script. In firsts trials, we try to send a numbre (50) then a word (test) to see the results of the program :

We can see that any test are validated... After some search about flaw in python we can find that we can use _ (underscore) between numbers, like this : 1_0_0_1. And with trials and patience, we can find the flag when we send this : 1_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0 :

🚩 FLAG

404CTF{Und3r5c0r35_1n_1nt3g3r5??}