[-] Software Link:
[-] Affected Versions:
Version 3.4.2 and probably prior versions.
[-] Vulnerability Description:
The vulnerable code is located in the /oc-includes/osclass/controller/ajax.php script:
case 'custom': // Execute via AJAX custom file
if(Params::existParam('route')) {
$routes = Rewrite::newInstance()->getRoutes();
$rid = Params::getParam('route');
$file = '../';
if(isset($routes[$rid]) && isset($routes[$rid]['file'])) {
$file = $routes[$rid]['file'];
}
} else {
// DEPRECATED: Disclosed path in URL is deprecated, use routes instead
// This will be REMOVED in 3.4
$file = Params::getParam('ajaxfile');
}
if($file == '') {
echo json_encode(array('error' => 'no action defined'));
break;
}
// valid file?
if( stripos($file, '../') !== false || stripos($file, '/admin/') !== false ) ...
echo json_encode(array('error' => 'no valid ajaxFile'));
break;
}
if( !file_exists(osc_plugins_path() . $file) ) {
echo json_encode(array('error' => "ajaxFile doesn't exist"));
break;
}
require_once osc_plugins_path() . $file;
User input passed through the "ajaxfile" request parameter when handling a "custom" action within
the AJAX interface is not properly sanitized being used in a call to the "require_once()" function
at line 255. This can be exploited to include arbitrary local files and execute arbitrary PHP code
when the application is running on Windows.
[-] Solution:
Update to version 3.4.3 or later.
[-] Disclosure Timeline:
[29/09/2014] - Vendor notified
[29/09/2014] - Vendor response
[09/10/2014] - Version 3.4.3 released: http://blog.osclass.org/2014/10/09/osclass-3-4-3
[09/10/2014] - CVE number requested
[11/10/2014] - CVE number assigned
[31/12/2014] - Public disclosure
[-] CVE Reference:
The Common Vulnerabilities and Exposures project (cve.mitre.org)
has assigned the name CVE-2014-8084 to this vulnerability.
[-] Credits:
Vulnerability discovered by Egidio Romano.
[-] Original Advisory: