This module exploits a php unserialize() vulnerability in Horde <= 5.1.1 which could be abused to allow unauthenticated users to execute arbitrary code with the permissions of the web server. The dangerous unserialize() exists in the 'lib/Horde/Variables.php' file. The exploit abuses the __destruct() method from the Horde_Kolab_Server_Decorator_Clean class to reach a dangerous call_user_func() call in the Horde_Prefs class.
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.
– Jim O’Gorman | President, Offensive Security