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CVE-2014-1691 is a PHP Object Injection vulnerability in the Horde Framework (versions 5.1.0 and 5.1.1), specifically in the framework/Util/lib/Horde/Variables.php script. The vulnerability allows remote attackers to inject crafted serialized objects into the _formvars form parameter, which are then unserialized by the application. By leveraging a chain of magic methods and class properties (including classes such as Horde_Config), an attacker can achieve arbitrary PHP code execution via eval() or call_user_func(). The vulnerability is present in any application built on a vulnerable Horde Framework and is triggered by unsafe usage of unserialize() on user-supplied data.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module (modules/exploits/unix/webapp/horde_unserialize_exec.rb) that exploits a PHP object injection vulnerability (CVE-2014-1691) in Horde Groupware versions 5.1.1 and earlier. The exploit targets the unserialize() function in 'lib/Horde/Variables.php', allowing unauthenticated remote attackers to execute arbitrary PHP code as the web server user. The module crafts a malicious serialized PHP object chain that triggers code execution via the __destruct() method in the Horde_Kolab_Server_Decorator_Clean class, ultimately reaching a call_user_func() call in the Horde_Prefs class. The exploit sends a POST request to the '/horde/login.php' endpoint with the payload, and the PHP code to be executed is delivered via a custom HTTP header (Cmd), base64-encoded. The repository is operational and provides a working exploit for remote code execution, requiring only network access to the vulnerable Horde instance. The code is written in Ruby and is designed to be used within the Metasploit framework.
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