Title: Remote file upload vulnerability in videowhisper-video-conference-integration wordpress plugin v4.91.8 |
Author: Larry W. Cashdollar, @_larry0 |
Date: 2015-03-29 |
CVE-ID:[CVE-2015-9271] |
CWE: |
Download Site: https://wordpress.org/support/plugin/videowhisper-video-conference-integration |
Vendor: http://www.videowhisper.com/ |
Vendor Notified: 2015-03-29 |
Vendor Contact: http://www.videowhisper.com/tickets_submit.php |
Advisory: http://www.vapid.dhs.org/advisory.php?v=116 |
Description: 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: *Update* You can directly execute php by uploading file extension ending in .phtml, .rhtml, .pht as long as the extension isn't defined in the
apache mime.types. This was a previously discovered vulnerability that was not properly fixed by the author. The patch was insufficient
in blocking malicious file uploads.
./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($filename,'.php')) exit; can be by passed by using the extension .Php but the file extension check would allow files like
test.Php.shtml
<?php
if ($_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 |
Export: JSON TEXT XML |
Exploit Code:
|
Screen Shots: |
Notes: |
Larry W. Cashdollar
Larry Cashdollar
Larry W. Cashdollar vulnerability
Larry Cashdollar advisory