Funmail 2.0 is the second RE challenge for TUCTF 2017.

Whilst it had me furiously pulling my hair out for 2 hours, it ended up being a simple case of manually redirecting execution flow inside a debugger (or patching the binary I guess) to receive the flag.

https://github.com/Ov3rflow/TUCTF/tree/master/funmail2.0

Original writeup (https://github.com/Ov3rflow/TUCTF/tree/master/funmail2.0).