Root Cause Analysis – Integer Overflows

Foreword Over the past few years, Corelan Team has received many exploit related questions, including "I have found a bug and I don’t seem to control EIP, what can I do ?"; "Can you write a tutorial on heap overflows" or "what are Integer overflows". In this article, Corelan Team member Jason Kratzer (pyoor) tries […]

Root Cause Analysis – Memory Corruption Vulnerabilities

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 of crashes, even for heavily targeted applications, was easy.  However, determining the exploitability of these crashes, […]

Exploit writing tutorial part 3 : SEH Based Exploits

In the first 2 parts of the exploit writing tutorial series, I have discussed how a classic stack buffer overflow works and how you can build a reliable exploit by using various techniques to jump to the shellcode.  The example we have used allowed us to directly overwrite EIP and we had a pretty large […]

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