e107 2.1.2: SQL Injection through Object Injection

23 Dec 2016 by Hendrik Buchwald

e107

The 23rd gift in our advent calendar presents security issues in e107, a content management system that is in development since 2013. Among others, we identified a critical issue that allows any user to update his permissions and to extract sensitive information from the database by exploiting a PHP object injection vulnerability.

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Expression Engine 3.4.2: Code Reuse Attack

5 Dec 2016 by Hendrik Buchwald

Expression Engine

Expression Engine is a popular general purpose content management system that is used by thousands of individuals, organizations, and companies around the world. The open-source version has about 250,000 lines of code and is a medium-sized web application. In this post, we will examine a code reuse vulnerability that leads to remote code execution. This vulnerability type allows an attacker to partly control the applications logic and to chain existing code fragements.

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Coppermine 1.5.42: Second-Order Command Execution

2 Dec 2016 by Martin Bednorz

Coppermine

The second gift in our advent calendar contains descriptions of vulnerabilities in Coppermine, a very popular picture gallery application written in PHP and in active development since 2003. It consists of ~160,000 lines of code (medium-sized web application) and is downloaded roughly 1,200 times per week.

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