PlaidCTF 2016 Pwnable butterfly writeup

Hi

last weekend I enjoyed alot in 2~3 hours free time at Plaidctf 2016. Here you can see pwnable butterfly writeup.

We are given a pwnable x86-64 binary with following information:

hamidx9@expl:~/ctf/plaid2016/pwn/butterfly$ file butterfly_33e86bcc2f0a21d57970dc6907867bed 
butterfly_33e86bcc2f0a21d57970dc6907867bed: ELF 64-bit LSB  executable, x86-64, version 1 (SYSV), dynamically ...
moreā€¦