N00bz CTF 2024 writeups

Date: 05/08/2024

Above we can see a small program that asks the user to calculate answers of adding two random numbers. The user is asked to choose the number of questions he wants to answer and is awarded with the respective number of characters of the flag. However since there is an exponential delay due to pow(2,i), the classical approach of an automated solver would take too long. The smart thing to do here is to use the negative indexing feature of...