I was reading on DNS rebinding and how browsers protect us with DNS pinning.
I was curious how public DNS servers reply when you do a query for a host that is binded to an RFC1918 address.
DNS rebinding basically works as follows.
Attackers control the DNS of a domain (‘www.example.com’); A user is lured (phishing, web commment, …) into visiting a site controlled by the attacker, the DNS response is a public IP … Read more.
Sometimes it can be useful to do a HTTP GET or HTTP POST request from a PHP script. I used to use curl to do this but there’s a ‘cleaner’ way to do this.
For reference, this is how to do the HTTP POST request in curl from PHP
The PEAR – PHP Extension and Application Repository contains a number of useful reusable PHP components.
The component we are going to use is HTTP_Request2. You … Read more.
From the CERT.be website : Open DNS resolvers are frequently being abused to conduct efficient DDoS attacks towards websites, infrastructure and services..
You can detect open resolvers on your network with a vulnerability information management tool (for example Qualys), via the Open Resolver Project or manually with an nmap command.
Keeping track of the different output files becomes more difficult if you have to do this often. I wrote a script that imports the nmap … Read more.
STeBB ( Security Testing Browser Bundle ) is an all in one web security toolkit for web application security testers. Built over Mozilla Firefox, this Linux based open source browser bundle comes with a vast array of awesome tools that help you secure your web application. STeBB runs in Debian based Linux distributions and can be used to thoroughly security test the web applications, especially the OWASP Top 10 risks. Basically it’s a web pen … Read more.
For a new project I needed a tool that could scan a web server for the http status code of different URLs and have the results listed in a easily parseable result. The URLs are typical Linux resources (f.e. the password file, the hostname, services file, …) that could lead to disclosing sensitive system information.
There are already a number of tools that can achieve this but none really provided the output that I needed. … Read more.
It can sometimes be useful to have a script that captures all the HTTP requests and that logs these requests to a file. The PHP script below works for me. I use this script in combination with the htaccess file to catch all web page requests and redirect them to one file.
The .htaccess file :
The apache config for the virtual host is straightforward.
Adobe recently suffered from a break-in where intruders were able to get hold of Adobe users’data, containing email addresses, encrypted passwords, password hint names, etc.
This break-in was acknowledged by Adobe (note that the acknowledgement page from Adobe does not have a date or timestamp, at least not on Nov-17, it only mentions ‘recently’).
The posting on the Sophos blog by Paul Ducklin provides a very interesting overview on the cryptographic blunders made by Adobe. … Read more.
This post demonstrates how relatively easy it is to setup a system that harvests user credentials (username and password) for different web services (Facebook, Twitter, Yahoo).
For this exercise we’ll use two machines :
An end-user laptop or desktop with a browser; Kali Linux with a number of pentesting tools. The Kali Linux machine needs at least one network interface with internet connection.
The exercise scenario involves three major steps :
Have … Read more.
I run this blog on WordPress. One of the major advantages of WordPress is its support for customizable web themes. These themes contain the graphical markup (CSS, images) and PHP code to mangle the data that is displayed.
I’ve adapted some of the default functions to have the display of archives and blog excerpts behave differently to the default provided by WordPress.
WordPress archives are accessible via the wp_get_archives function. This function has a number … Read more.
Web applications have become important assets in a company infrastructure. If you need to do a penetration test then it is essential that you have a basic understanding of how to analyse and test these web applications.
Many, if not all, require some form of authentication. Sometimes this happens via Basic Authentication where the user needs to enter credentials in some form of popup in the web browser. More often though the authentication happens via … Read more.
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