In this challenge, we are showing how we can leak libc base address and overwrite __free_hook by exploiting Uninitialized Stack Variables and Overlapping Heap Chunks.

This is a good challenge for understanding how to exploit x86_64 binaries with Full RELRO, Canary, NX, PIE, and ASLR enabled.

Original writeup (https://github.com/sajjadium/ctf-writeups/tree/master/RCTF/2018/RNote3).