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Introduction to Buffer Overflow by Ghost_Rider

Hello, here I am again, this time I'll let you know what is in fact buffer overflow and how you can detect if some program is vulnerable to buffer overflow exploits. This tutorial has C source code, so if you don't know C you can have some problems in this tutorial, you also need to have some notions on ASM and how to use gdb. I tried to do the easiest I could, but still this tutorial isn't one of those where you really don't know **censored** about nothing and when you end it you know all this. This one takes some work to understand, hey it took huge work to write! A little inside note, like everyone that is reading this lines I like to learn, so some weeks ago I said to myself "Hey what the heck, why not to start reading some texts about buffer overflows, I know how everything work but just superficially", so I just started learning and now I'm trying to pass the knowledge that I gained, to everyone that is interested. So this won't be one of those texts where you'll learn everything, this will be like a walkthrough, like the title says an Introduction, (In the end I'll give you some nice texts). If you have any questions concerning this tutorial post in our message board, if you find any "bug" in this tutorial please email me and I'll correct it. Enjoy.

Writing Buffer Overflow Exploits - a Tutorial for Beginners

Summary
Buffer overflows in user input dependent buffers have become one of the biggest security hazards on the internet and to modern computing in general. This is because such an error can easily be made at programming level, and while invisible for the user who does not understand or cannot acquire the source code, many of those errors are easy to exploit. This paper attempts to teach the novice - average C programmer how an overflow condition can be proven to be exploitable.