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Video -
General
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Written by Vivek Ramachandran
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Friday, 24 April 2009 21:50 |
In this video series we will learn the basics of Buffer Overflow
attacks and demonstrate how one can exploit Buffer Overflows in
programs for fun and profit. The pre-requisite for this video series is
that you are familiar with Assembly language. If you are not familiar
with Assembly language, no worries, I have created detailed video
tutorials for Assembly language here - Assembly Language Primer for
Hackers.
In Part 1 of the Buffer Overflow
series we will look at why buffer overflow attacks happen. We will
discuss how the is laid out when a function call happens, then how a
buffer can be overwritten if proper bounds checking does not happen and
finally how a hacker could take control of the program by
overwriting the return address stored on the stack to an
arbitrary value.We will use a sample program - Demo.c to demonstrate how
it is possible to change the Return address by overwriting the stack
using user supplied input.
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