Below, you will find the full exploit for PlaidCTF pwn200 task. The full write-up will follow.

In this article I will share with you the solution to Secure Login challenge presented at Acebear CTF, this task was worth 900 points. Even though I did not manage to solve the challenge on time, I still enjoyed it a lot.

In this challenge, we are given a service IP and PORT, to which we can connect using netcat or any similar tool. We are also provided with a tar file that contains the service binary and some .so modules.

Recently I decided to start playing CTFs again, and since I needed some training before playing a real one, I decided to take a look at some recent CTFs in CTFtime.org.

And then I found this crypto task with no write-up for it yet, and that’s why I jumped into it :)