handler

HITB 2011 CTF – Reversing Vectored Exception Handling (VEH)

Today we will have a look at a CTF binary from HITB pre qualifications CTF 2011. This is an interesting binary to reverse because Vectored Exception Handling (VEH) was used in the challenge…
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Exploit writing tutorial part 6 : Bypassing Stack Cookies, SafeSeh, SEHOP, HW DEP and ASLR

Introduction In all previous tutorials in this Exploit writing tutorial series, we have looked at building exploits that would work on Windows XP / 2003 server. The success of all of these exploits (whether they are based on direct ret overwrite or exception handler structure overwrites) are based on the fact that a reliable return […]

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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