heap exploitation Archives - Page 2 of 2 - Corelan CyberSecurity Research

Exploit writing tutorial part 11 : Heap Spraying Demystified

A lot has been said and written already about heap spraying, but most of the existing documentation and whitepapers focus on IE7 or older versions. Although there are a number of public exploits available that target IE8, the exact technique to do so has not been really documented in detail. Of course, you can probably derive how it works by looking at those public exploits. With this tutorial, I'm going to provide you with a full and detailed overview on what heap spraying is, and how to use it on old and newer platforms. I'll start with some "ancient" techniques (or classic techniques if you will) that can be used on IE6 and IE7. We'll also look at heap spraying for non-browser applications. Next, we'll talk about precision heap spraying, which is a requirement to make DEP bypass exploits work on IE8. I'll finish this tutorial with sharing some of my own research on getting reliable heap spraying to work on IE9. Read more

WoW64 Egghunter

Traditional Egghunter

An Egghunter is nothing more than an assembly routine to find shellcode somewhere in memory. We typically deploy an Egghunter when there is no more room in our buffer that we can use to initially redirect EIP Read more

Metasploit Bounty – the Good, the Bad and the Ugly

On June 14, 2011 HD Moore announced the Metasploit Bounty contest, offering a cash incentive for specific vulnerabilities to be submitted as modules in the Metasploit Framework. Titled "30 exploits, $5000 in 5 weeks", a post on the Rapid7 blog lists the 30 "bounties" selected by the MSF team, waiting for someone to claim and submit a working exploit module. Read more

Hack Notes : Ropping eggs for breakfast

Introduction

I think we all agree that bypassing DEP (and ASLR) is no longer a luxury today. As operating systems (such as Windows 7) continue to gain popularity, exploit developers are forced to deal with increasingly more memory protection Read more

Exploit writing tutorial part 10 : Chaining DEP with ROP – the Rubik’s[TM] Cube

About 3 months after finishing my previous exploit writing related tutorial, I finally found some time and fresh energy to start writing a new article. In the previous tutorials, I have explained the basics of stack based overflows and how they can lead to arbitrary code execution. I discussed direct RET overflows, SEH based exploits, Unicode and other character restrictions, the use of debugger plugins to speed up exploit development, how to bypass common memory protection mechanisms and how to write your own shellcode. While the first tutorials were really written to learn the basics about exploit development, starting from scratch (targeting people without any knowledge about exploit development) you have most likely discovered that the more recent tutorials continue to build on those basics and require solid knowledge of asm, creative thinking, and some experience with exploit writing in general. Today's tutorial is no different. I will continue to build upon everything we have seen and learned in the previous tutorials. Today I will talk about ROP and how it can be used to bypass DEP (and ASLR)... Read more

corelanc0d3r interviewed by CubilFelino Security Research Labs

Hi all,

Just wanted to drop a few words about that fact that I have been interview by chr1x (, the maintainer of CubilFelino Security Research Labs (sectester.net).

You can read the entire interview here : http://chr1x.sectester.net/corelanc0d3r.php

Posts:

Traditional Egghunter

Introduction