Protostart CTF - format0 - walkthrough

Next challenge from Protostar CTF. This time we will check format0. Let's get to work!

Below is the screen from the vulnerable function vuln():

As you can see from the source of that challenge, we need to set our EAX to deadbeef to solve it. Below few lines about it:

And finaly we're back in GDB:

Cheers ;]