Precurio 2.1: Remote Command Execution via Xinha Plugin

9 Dec 2016 by Hendrik Buchwald

Precurio

Precurio is an Intranet portal that can be used as a calendar, phone directory, and much more. It is available as an open-source and commercial solution. We focused our analysis exclusively on the open-source version and detected several critical vulnerabilities that can be used to execute PHP code on the target system without any form of authentication.

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PHPKit 1.6.6: Code Execution for Privileged Users

8 Dec 2016 by Martin Bednorz

PHPKit

Today’s gift in our advent calendar contains PHPKit, a German web content management system in development since early 2002. With its ~42,000 lines of code it is a rather small application and the latest version is 1.6.6. This post describes two severe vulnerabilities in the administration section that require a minimal user permission for exploitation.

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Serendipity 2.0.3: From File Upload to Code Execution

7 Dec 2016 by Hendrik Buchwald

Serendipity

Serendipity is an easy to maintain blog engine. There are a lot of plugins that can be used to extend the functionality, this article will focus on its core though. With close to 125,000 lines it is a medium-sized web application. In this post, we will show how attackers can bypass existing security mechanisms which can lead to remote code execution attacks.

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Roundcube 1.2.2: Command Execution via Email

6 Dec 2016 by Robin Peraglie

Roundcube

Roundcube is a widely distributed open-source webmail software used by many organizations and companies around the globe. The mirror on SourceForge, for example, counts more than 260,000 downloads in the last 12 months1 which is only a small fraction of the actual users. Once Roundcube is installed on a server, it provides a web interface for authenticated users to send and receive emails with their web browser.

In this post, we show how a malicious user can remotely execute arbitrary commands on the underlying operating system, simply by writing an email in Roundcube 1.2.2 (>= 1.0). This vulnerability is highly critical because all default installations are affected. We urge all administrators to update the Roundcube installation to the latest version 1.2.3 as soon as possible.

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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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