Wizer CTF 2024 All Challenges image

Wizer CTF 2024 All Challenges

Date: 08/02/2024

Last week I was able to participate at a wonderful CTF organized over at Wizer. This CTF consisted of 6 web challenges in varying difficulty where participants were challenged to a Blitz speed-hacking competition of who can solve the most in 6 hours very generous prizes for the top 3....

Reading Time: 22 minutes

N00bz CTF 2024 writeups image

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...

Reading Time: 9 minutes