Posts by author: Dr. Johannes Dahse

WordPress Plugin Vulnerabilities 2017 VS. Static Analysis

11 min read 29 Nov 2017 by Johannes Dahse
WordPress plugins are widely adopted and an attractive target for attackers. In this technical blog post we analyze the most critical vulnerabilities in WordPress plugins of 2017 and share insights about how static code analysis can detect these.

How security flaws in PHP's core can affect your application

7 min read 20 Jul 2017 by Johannes Dahse
Popular security vulnerabilities occur due to bad coding practices or coding mistakes. Often a single missing character or incautiously used language feature opens the gates for an attacker. But even when all best practices for secure programming are carefully adhered to, a PHP application’s source code is only as secure as the PHP interpreter it runs on. Learn how memory corruption bugs in the PHP core itself can affect applications.

What we learned from our Advent Calendar

8 min read 24 Dec 2016 by Johannes Dahse
In our final advent calendar post, we summarize what we learned during this thrilling advent time. We reveal how the affected vendors reacted to our reportings behind the scenes. Was it right to publish all these sensitive issues? What conclusions can we draw about the security state of PHP applications from our findings?

OpenConf 5.30 - Multi-Step Remote Command Execution

10 min read 17 Dec 2016 by Johannes Dahse
Today, we present a multi-step command execution vulnerability in the popular conference management software OpenConf. The vulnerability was reported and fixed a while ago, but the chain of 4 exploitation steps involved makes it a very interesting vulnerability sample for our advent calendar. 4 - 3 - 2 - 1 …

phpBB 2.0.23 - From Variable Tampering to SQL Injection

7 min read 13 Dec 2016 by Johannes Dahse
In our 12th advent calendar gift, we would like to cover an exciting SQL injection in phpBB2. Although phpBB2 was replaced by its successor phpBB3, it is still one of the most popular bulletin boards. RIPS detected a less severe but very beautiful SQL injection vulnerability that bases on a PHP quirk we will examine in detail in this post.