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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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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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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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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Codegate 2011 CTF – Binary200 – Anti Debugging Techniques Explained
Aloha,
Again I stumbled upon a nice reverse-me, binary200 from the Codegate 2011 CTF.
And again there are some really interesting anti-debugging tricks implemented, so I decided to produce another video.
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Anti-debugging tricks revealed – Defcon CTF Qualifications 2009: Bin300 Analysis
A while ago I stumbled upon an awesome write-up of a very nice CTF challenge created by sapheads: http://hackerschool.org/DefconCTF/17/B300.html I love cartoons, and I love reversing, so I decided to play a little bit with that binary (b300.exe) which was a lot of fun. Because some interesting anti-debugging tricks were implemented into the binary…
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The Honeypot Incident – How strong is your UF (Reversing FU)
Interested in capturing, documenting and analyzing scans and malicious activity, Corelan Team decided to set up a honeypot and put it online. In the first week of december 2010, Obzy built a machine (default Windows XP SP3 installation, no patches, firewall turned off), named it “EGYPTS-AIRWAYS”, set up a honeypot + some other monitoring tools, and connected it to the internet.
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Offensive Security Exploit Weekend
Introduction I’m excited and honored to be able to announce that Sud0, one of our Corelan Team members, has won the Offensive Security Exploit weekend, an exploiting exercise only available to Offensive Security certified alumni. The challenge was built around a vulnerability in Foxit Reader. Each participant was pointed to a Proof of Concept exploit, […]
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