exploit development tutorial (33)

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. Read more

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. Read more

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) Read more

Yesterday, sickn3ss (one of the frequent visitors of the #corelan channel on freenode IRC) posted a really interesting question.

The question

While testing ROP gadgets, as part of the process of building a DEP bypass exploit for WM Downloader, Read more

Special Thanks:

To my wife for putting up with my crap. Also SolarWinds for keeping an open communication while fixing the issue. And of course... Corelan Team 😛

Audio:

Many thanks to DJ Great Scott for supplying me with Read more

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 Read more

#corelan

Some of you may have already noticed … Corelan team decided to open an official channel on IRC (freenode).  About 24 hours ago, the channel went live and we have had the pleasure to greeting about 50 users Read more

Over the past few weeks, Corelan Team has given its undivided attention to fuzzing ftp client applications. Using a custom built ftp client fuzzer, now part of the Metasploit framework, the team has audited several ftp clients and applications that use an embedded client ftp component. One example of such an application is a tool that would synchronize / backup data from a computer to a remote ftp server. The 3 main audit/attack vectors that were used during the "project" were send back overly long responses to ftp commands / requests sent by the ftp client to the server send back a file/directory listing that contains overly long file/folder names try to download a file that has an overly long filename. Read more

About 3 months after finishing my previous exploit writing related tutorial, I finally found some time and fresh energy to start writing a new article. In the previous tutorials, I have explained the basics of stack based overflows and how they can lead to arbitrary code execution. I discussed direct RET overflows, SEH based exploits, Unicode and other character restrictions, the use of debugger plugins to speed up exploit development, how to bypass common memory protection mechanisms and how to write your own shellcode. While the first tutorials were really written to learn the basics about exploit development, starting from scratch (targeting people without any knowledge about exploit development) you have most likely discovered that the more recent tutorials continue to build on those basics and require solid knowledge of asm, creative thinking, and some experience with exploit writing in general. Today's tutorial is no different. I will continue to build upon everything we have seen and learned in the previous tutorials. Today I will talk about ROP and how it can be used to bypass DEP (and ASLR)... Read more

Hi all,

I just wanted to drop a few lines to let you know that, earlier today, my exploit write-up article about this vulnerability was published on www.abysssec.com.

You can find the article here : http://www.abysssec.com/blog/2010/03/ken-ward-zipper-stack-bof-0day-a-not-so-typical-seh-exploit/

Enjoy !