BurpSuite – Update HTTP Header in Session Handling Rules

Introduction

First, this post will not cover the basics of recoding macros or use of the session handling rules in BurpSuite. There are a lot of basic stuff to be found in the internet [1][2]. However, by default, Burp is unable to update or modify an http request HTTP header by using session handling rules and macros. This can cause in problems if you investigate REST APIs or applications which protects requests with one-time CSRF tokens. Further, the Portswigger community blog is not very useful to address this problem [4][5]. Continue reading “BurpSuite – Update HTTP Header in Session Handling Rules”

Wammer – WiFi jamming made easy

Since years the IEEE 802.11 WiFi protocol has a well-known design flaw which allows attackers to disconnected clients from the WiFi access point they’re connected to.

All he has to do, is to send “dauthentication frames” to the WiFi access point. Because the IEEE 802.11 WiFi standard doesn’t require encryption for such frames, an attacker is able to perform the attack even though he isn’t connected with that access point. Continue reading “Wammer – WiFi jamming made easy”

Bypass Kiosk Mode with Libre/Open Office

Given you have restricted access to a computer and can only open certain programs. Usually this is caused by the Kiosk Mode that has a white list which contains only trusted programs. Libre/Open Office is a widely used/unlocked program on such Kiosk Modes. Some vendors unlock the whole Libre/Open Office folder: “C:\Program Files\LibreOffice 5\program” or “C:\Program Files (x86)\OpenOffice 4\program” including all other binary files. Python version 3.5.4 (Libre Office) / 2.7.13 (Open Office) is automatically included in the default installation of Libre/Open Office. Now a user can create a Libre/Open Office macro to run a python shell: Continue reading “Bypass Kiosk Mode with Libre/Open Office”

Chrome Information Leakage – Prediction Service & Preload

Last year in February, I found a vulnerability at google chrome and submitted it(Bug Report). So far nothing has happened and now the vulnerability  has been published on twitter: https://twitter.com/zerosum0x0/status/958890437837692928 Continue reading “Chrome Information Leakage – Prediction Service & Preload”

The Future of Bitcoin

Bitcoin is getting traction and attention by mainstream media. Price hits all time high at 3000$ and stays above the gold price. At the same time the Bitcoin community is meeting their biggest challenge so far. The question of: ‘How to scale Bitcoin?’ This was discussed for two days at the Future of Bitcoin conference in Arnheim / Netherlands, with developers, researchers and miners.

Continue reading “The Future of Bitcoin”

Security of Things – World Conference

High level atmosphere. High level management. High level topics.

The companies represented came from nearly every industry sector: banking, energy, telecommunication, government, manufacturing &  chemical industry as well as retail, entertainment, transportation, automotive and of course IT security. The delegates and speakers were all C-level management and mostly CIO / CISO.

So what are the hottest topics? Where is the industry in terms of IoT Security at the moment? Continue reading “Security of Things – World Conference”

Ergonomic Password Generator

To secure applications it is often necessary to verify the identity of the user, this process is called authentication. There are several methods to authenticate a user, with passwords being the most common one. Passwords are usually chosen by the user. Those user passwords are often not strong enough and can be easily guessed by brute forcing or simple deduction (e.g.  pet names etc.). Continue reading “Ergonomic Password Generator”

Immutable, reliable, secure – A brief history of blockchain security

Blockchain technology is marketed as the Web 3.0 and because of it’s distributed structure it wipes out single points of failure. But does that mean there are no points of failures at all? Let’s look at some important blockchain hacks / failures from the tech perspective.

[Remark: This is not about $$$ Bitcoin hacks, where lousy DB implementations, web applications, key handling or simply social engineering let to hacked bitcoin exchanges or wallets.] Continue reading “Immutable, reliable, secure – A brief history of blockchain security”

Fingerprinting of web browsers and the consequences for privacy

Introduction

Fingerprinting of web browsers is a known technique to identify website users. This enables to track users and their habits across websites without the use of cookies. Approximately 93 percent of Web browsers have a unique fingerprint. Particularly meaningful are lists of installed plugins, screen resolution, time zone, language and fonts. In this case a unique hash for the user’s browsers is created. This hash can be used to (re-)identify visitors over different sessions and IP addresses. Continue reading “Fingerprinting of web browsers and the consequences for privacy”