Posts:

Introduction

Hi all,

While preparing for my Advanced exploit dev course at Derbycon, I’ve been playing with heap allocation primitives in IE.  One of the things that causes some frustration (or, at least, tends to slow me down during Read more

As the CSO/CISO/person responsible for Information Security, your job is to…  well … do you even know?  Does upper management know? 

"Our crappy CSO <this>…" and "Our stupid CSO <that>…" are statements commonly used by various (techie) people, throwing Read more

Good morning Amsterdam, good morning readers, welcome to the second day of the Hack In The Box conference. The speaker for the first keynote didn’t show up,  so we’ll jump right into the next keynote.

Jennifer starts Read more

Table of Contents

• Foreword
• Introduction
• Analyzing the Crash Data
• Identifying the Cause of Exception
  • Page heap
  • Initial analysis
• Reversing the Faulty Function
• Determining Exploitability
  • Challenges
  • Prerequisites
  • Heap Basics
    • Lookaside Lists
    • Freelists
  • Preventative Security Measures
    • Safe-Unlinking
    • Heap Cookies
  • Application Specific Read more

Introduction

For the past year or so I’ve spent a significant amount of time fuzzing various applications with the hopes of identifying exploitable crashes.  Early on in my research I quickly realized that building fuzzers and generating large quantities Read more

Introduction

Time flies. Almost 3 weeks have passed since we announced the ability to run mona.py under WinDBG.  A lot of work has been done on mona.py in the meantime.  We improved stability and performance, updated to pykd.pyd 0.2.0.14 Read more

Ho Ho Ho friends,

It has been a while since we posted something on the Corelan Team blog, I guess we all have been busy doing … stuff and things, here and there.  Nevertheless, as the year is close Read more

If you didn’t register your ticket for the Corelan Live Exploit Development training at Derbycon 2012, then there is bad news for you…   We’re sold out.

Not all is lost though. For the second year in a row, Corelan Read more

In less than a week from now, Hack In The Box Amsterdam will open its 2012 edition. The conference will take place in the Okura Hotel, and features 3 days of training, 2 days of quad-track talks, a CTF and HackWEEKDAY, a 12 hour hackathon hosted alongside the actual confererence. The line-up looks promising... Read more

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