GNUCITIZEN

When I was playing/introducing the partial disclosure practice an year and something ago, I did get contacted by numerous dodgy characters willing to buy yet undisclosed vulnerabilities for substantial amount of money.

Of course, requests of that nature were kindly ignored. I couldn’t believe that someone was willing to give me so much money for something I virtually spent 2-3 hours maximum to produce. [...]

The truth is that some things will never get picked up by the community unless you really start bragging about them. Repetition is a key element.

Obviously not an extremely devastating vulnerability but the issue, which I have reported here and also logged in Mozilla’s bugzilla 3 months ago, is still present and works quite well. This is yet another design bug which abuses the way browsers work rather then exploit a vulnerability within the software.

The issues is quite simple. [...]

I’ve been using Ubuntu Server Edition for several years now as my pentesting toolbox platform. A few months ago, I also migrated my workstation to Ubuntu Desktop Edition. Recently, I also migrated my personal laptop to Ubuntu Desktop. I guess I’m officially an Ubuntu fan. W00t!

I’m not going to discuss the Ubuntu security model in detail, but in short, one of the highlights is that by default logged-in users run processes with restricted privileges. [...]

This will be a quick post just to share some POCs and more information regarding the recent Clickjacking technique, i.e. UI Redress Attack, a name suggested by Michael Zalewski.

Clickjacking is an oldie but, a goodie. You can track the origin of the attack back at the beginning of this decade. Clickjacking is essentially the ant-CSRF killer. It is also the killer of Flash, AJAX (because AJAX apps are sometimes easier to clickjack, look at Google) and some other technologies. [...]

I’m really excited that HITBSecConf2008 Malaysia is coming up soon: end of October to be precise. I highly recommend our readers to attend such event, as it’s organized by one of the finest security event crews I have ever dealt with. There are tons of talks I want to attend, which I will cover in another post. [...]

The details of the vulnerability were covered in my previous post. In this one I would like to briefly talk about the impact.

Obviously, the vulnerability is very simple. Simple yet effective. However, this is not the type of vulnerability someone can exploit on a massive scale. Here is why.

Attack Vectors

The key element of the attack vector presented in my previous post is the attackers’ ability to point the victim to a file hosted on a NETBIOS share. [...]

In this post I intend to give a brief overview of the QuickTime vulnerability which I partially-disclosed over here. I should have made these details public long time ago but better late than never. The vulnerability has been fixed for several months now and I believe it is safe to talk about it in the public.

Let’s start with an example. The following is the source code of a malicious QuickTime SMIL file:

First of all, we start with the SMIL header (SMILtext). [...]

A remote vulnerability exists in the QuickTime player for Windows XP and Vista (latest service packs). Other versions are believed to be affected as well. For now, no details will be released regarding the method of exploitation.

Because we are an active security group and because we encounter some very interesting vulnerabilities in our daily work, we often share our findings with the masses in order to give something back to the community. [...]

How easy is for attackers to compromise the LAN? Answer: Very easy! With a few simple tricks, attackers can easily poison the local name resolution system for the machines inside a given LAN. Network Devices and Apple products are most vulnerable among others of course.

It is all due to mDNS. From Wikipedia’s article:

The problem with mDNS is that it is spoof-able. Here is how it works. A mDNS enabled client will perform a mDNS query on a multicast address. [...]