Security Sift

Introduction In this seventh installment of the Windows Exploit Development Series, I’ll introduce Unicode Buffer Overflows. We’ll start with a brief introduction to Unicode (what it is and why/how it’s used in Windows) and then jump right in to some example exploits. If you plan on following along, I recommend you have the following: A Windows environment (XP or Win 7 — my demos will be on the latter) Metasploit, Alpha2 or…

Introduction The buffer overflow exploits covered so far in this tutorial series have generally involved some form of direct EIP overwrite using a CALL or JMP instruction(s) to reach our shellcode. Today we’ll take a look at a different approach using Windows Structured Exception Handling (SEH). Before I begin explaining the basic mechanics of Windows Structured Exception Handling (as it’s implemented in an x86, 32-bit environment) it bears mentioning that…