This document is intended to provide a detailed study on the Heartbleed attack. It covers the required topics for understanding the exploit. The proof of concept will help visualize and perform the attack in a virtual scenario to understand the attack vector of the process of exploitation.
You can download it from the following link: https://packetstormsecurity.com/files/download/160655/Heartbleed.pdf
Source: https://packetstormsecurity.com/files/160655/Heartbleed-Attack.html