GEN:SID 1:2359
Message WEB-PHP Invision Board ipchat.php file include
Summary This event is generated when an attempt is made to exploit a known
vulnerability in the PHP web application Invision Board.
Impact Execution of arbitrary code on the affected system
Detailed Information Invision Board contains a flaw such that it may be possible for an attacker
to include code of their choosing by manipulating the variable root_path when
making a GET or POST  request  to a vulnerable system.

It may be possible for an attacker to execute that code with the
privileges of the user running the webserver, usually root by supplying
their code in the file conf_global.php.
Affected Systems Invision Power Services Invision Board 1.1.1
Attack Scenarios An attacker can make a request to an affected script and define their
own path for the root_path variable.
Ease of Attack Simple. No exploit software required.
Corrective Action Apply the appropriate vendor supplied patches

Upgrade to the latest non-affected version of the software
Additional References  
Rule References bugtraq: 6976