SEC Consult Vulnerability Lab Security Advisory < 20220614-0 >  
title: Reflected Cross Site Scripting  
product: SIEMENS-SINEMA Remote Connect  
vulnerable version: <=V3.0.1.0-  
fixed version: V3.1.0  
CVE number: CVE-2022-29034  
impact: medium  
found: 2022-03-01  
by: S. Robertz (Office Vienna)  
SEC Consult Vulnerability Lab  
An integrated part of SEC Consult, an Atos company  
Europe | Asia | North America  
Vendor description:  
"Siemens is a technology company focused on industry, infrastructure,  
transport, and healthcare.  
From more resource-efficient factories, resilient supply chains, and smarter  
buildings and grids, to cleaner and more comfortable transportation as well as  
advanced healthcare, we create technology with purpose adding real value for  
customers. By combining the real and the digital worlds, we empower our  
customers to transform their industries and markets, helping them to transform  
the everyday for billions of people."  
"SINEMA Remote Connect is the management platform for remote networks. It is a  
server application that enables the simple management of tunnel connections  
(VPN) between headquarters, service technicians, and installed machines or  
Business recommendation:  
The vendor provides a patch which should be installed immediately.  
Vulnerability overview/description:  
1) Reflected Cross Site Scripting (CVE-2022-29034)  
The application contains a reflected cross-site-scripting vulnerability that  
can be used to execute JavaScript code in the victim's browser.  
Proof of concept:  
1) Reflected Cross Site Scripting (CVE-2022-29034)  
The error occurs when setting the syslog server to an illegal IP address. An  
error message will pop up and will reflect the supplied IP address. However,  
the popup message does not use the proper JQuery method, and thus allows to  
inject JavaScript code. Note that dots can not be used in the JavaScript  
payload, as they will get filtered by the IP parser that runs beforehand.  
This was circumvented by supplying the JavaScript code in base64.  
Following request can be used to trigger the XSS:  
POST /services/syslog_client_settings HTTP/1.1  
Host: $host  
Cookie: sessionid=708xmctjzk39og596jp4q4r1udfom4l5;  
Content-Length: 153  
X-Requested-With: XMLHttpRequest  
X-Csrftoken: U5AQMbPh3JTcdfdBkgIvaLtoitpS7jUVFJNGNGIY50KZkt5szBzX2Uxz8XTNkr4c  
Referer: https://$host/services/syslog_client_settings  
Accept-Encoding: gzip, deflate  
Accept-Language: en-US,en;q=0.9  
Connection: close  
Vulnerable / tested versions:  
The following version has been tested and found to be vulnerable:  
* V3.0.1.0-  
Vendor contact timeline:  
2022-04-01: Sending advisory via  
2022-04-01: Issue tracked by Siemens under case #29947  
2022-04-19: Siemens confirms vulnerability. Patch available mid May.  
Coordinated advisory release date for 2022-06-14.  
2022-06-07: Asking for fixed versions & CVE numbers.  
2022-06-14: Coordinated advisory release.  
Version V3.1.0 fixes our identified issues as well as other security  
vulnerabilities according to the vendor. The firmware can be downloaded here:  
The vendor published a security advisory as well:  
Advisory URL:  
SEC Consult Vulnerability Lab  
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Europe | Asia | North America  
About SEC Consult Vulnerability Lab  
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EOF S. Robertz / @2022