Pwnable with an integer underflow bug when you buy an item you don't have enough money for, though with some tricks required to make the exploit succeed within the timeout considering network lag.

[Writeup on GitHub](https://github.com/kjcolley7/CTF-WriteUps/blob/master/2019/watevr/Club_Mate/README.md)

Original writeup (https://github.com/kjcolley7/CTF-WriteUps/blob/master/2019/watevr/Club_Mate/README.md).