Search Results for: pat
Debugging Fun – Putting a process to sleep()
Recently I played with an older CVE (CVE-2008-0532, http://www.securityfocus.com/archive/1/489463, by FX) and I was having trouble debugging the CGI executable where the vulnerable function was located.
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Exploit writing tutorial part 11 : Heap Spraying Demystified
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.
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Many roads to IAT
A few days ago a friend approached me and asked how he could see the import address table under immunity debugger and if this could be done using the command line.
I figured this would be a good time to take a look at what the IAT is, how we can list the IAT and what common reversing hurdles could be with regards to the IAT.
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WoW64 Egghunter
Traditional Egghunter An Egghunter is nothing more than an assembly routine to find shellcode somewhere in memory. We typically deploy an Egghunter when there is no more room in our buffer that we can use to initially redirect EIP to. If we are able to load our shellcode elsewhere in process memory, the Egghunter will […]
Metasploit Bounty – the Good, the Bad and the Ugly
On June 14, 2011 HD Moore announced the Metasploit Bounty contest, offering a cash incentive for specific vulnerabilities to be submitted as modules in the Metasploit Framework. Titled “30 exploits, $5000 in 5 weeks”, a post on the Rapid7 blog lists the 30 “bounties” selected by the MSF team, waiting for someone to claim and submit a working exploit module.
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mona.py – the manual
This document describes the various commands, functionality and behaviour of mona.py.
Released on june 16, this pycommand for Immunity Debugger replaces pvefindaddr, solving performance issues and offering numerous new features. pvefindaddr will still be available for download until all of its functionality has been ported over to mona.
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ROP your way into B-Sides Las Vegas 2011
Ahh.. Vegas.. What happens in Vegas, stays in Vegas right ?
With a variety of cons ahead (BlackHat, Defcon, B-Sides, …) there is plenty of things that can and will happen at Vegas. Will you be there to witness & enjoy it ?
Getting to Vegas is just one part of the story. Getting access to one of the cons is the second part, but in case of B-Sides, there are no tickets left anymore.
So, in case you were not able to get one of the free tickets to B-Sides LV, there’s good news !
We have 2 tickets for B-Sides LV (august 3 & 4, 2011)… and we’re giving them away…but not without a little ‘battle’…
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Corelan ROPdb
This page gathers generic/universal ROP chains that are solely based on gadgets taken from a single dll. The main requirements for a ROP chain to be listed here are: it must work on XP, Vista, Windows 7, 2003 and 2008 server. (the dll should not rebase and should not be ASLR enabled). If your ROP […]
Universal DEP/ASLR bypass with msvcr71.dll and mona.py
Over the last few weeks, there has been some commotion about a universal DEP/ASLR bypass routine using ROP gadgets from msvcr71.dll (written by Immunity Inc) and the fact that it might have been copied into an exploit submitted to Metasploit as part of the Metasploit bounty.
I’m not going to make any statements about this, but the ROP routine itself looks pretty slick.
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Mona 1.0 released !
FINALLY !
After spending almost 6 months of designing, developing and testing, and after ‘surviving’ 2 presentations (at AthCon and Hack In Paris), I am extremely excited and proud to present, on behalf of the entire Corelan Team, the general availability of mona.py.
With this announcement, we also declare pvefindaddr officially dead from this point forward. (This doesn’t mean pvefindaddr is now entirely worthless, because not all functions have been ported into mona yet, but we won’t be releasing any updates to pvefindaddr anymore and the entire project page/download page will eventually disappear)
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