The following post explains about basics of exploit writing for beginners by Sabari Selvan of E-hacking news.
Sabari Selvan is an Information Security Researcher who has more interest in PenTesting and Malware analysis. – See more at: http://www.ehackingnews.com
The post explains the following:
a) What is exploit writing
b) Impact of exploits
c) Introduction to stacks
d) Stack overflow attacks
Download the ppt here.