Exploit Writing Tutorials

Exploit writing tutorial part 3b : SEH Based Exploits – just another example

In the previous tutorial post, I have explained the basics of SEH based exploits. I have mentioned that in the most simple case of an SEH based exploit, the payload is structured like this : [Junk][next SEH][SEH][Shellcode] I have indicated that SEH needs to be overwritten by a pointer to “pop pop ret” and that […]

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 […]

Exploit writing tutorial part 2 : Stack Based Overflows – jumping to shellcode

Where do you want to jmp today ? In one of my previous posts (part 1 of writing stack based buffer overflow exploits), I have explained the basisc about discovering a vulnerability and using that information to build a working exploit. In the example I have used in that post, we have seen that ESP […]

Exploit writing tutorial part 1 : Stack Based Overflows

Last friday (july 17th 2009), somebody (nick)named ‘Crazy_Hacker’ has reported a vulnerability in Easy RM to MP3 Conversion Utility (on XP SP2 En), via packetstormsecurity.org. (see http://packetstormsecurity.org/0907-exploits/). The vulnerability report included a proof of concept exploit (which, by the way,  failed to work on my MS Virtual PC based XP SP3 En). Another exploit was […]

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