Buffer Overflow Primer Part 2 (Writing Exit Shellcode)

Welcome to Part 2 of the Buffer Overflow Primer. If you have not already done so, please start this series by viewing Part 1. The Buffer Overflow Primer requires that you know at least some basic Assembly Language. I have created a series of Assembly Language video tutorials for Hackers here, for those not familiar with the language.

In this video we will look at how to create Shellcode which we can use as payload while exploiting a buffer overflow vulnerability. Shellcode is nothing but machine code which the CPU can execute directly without requiring any further assembling, compilation or linking. Thus instructions in the Shellcode will be executed as-is. We will look at the exit() syscall and see how we can convert the assembly language code for invoking it into shellcode. In the process, we will be using the Objdump utility which ships with the Binary utils package. After you have gone through this video, you will be able to convert almost any assembly code into it's shellcode equivalent.

Related Videos from: Buffer Overflow Primer Series


Buffer Overflow Primer Part 1 (Smashing the Stack)	You are Viewing this Video Now!	Buffer Overflow Primer Part 3 (Executing Shellcode)	Buffer Overflow Primer Part 4 (Disassembling Execve)	Buffer Overflow Primer Part 5 (Shellcode for Execve)
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