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AUSCERT External Security Bulletin Redistribution
ESB-2022.2979
Advisory (icsa-22-167-07) Siemens SINEMA Remote Connect Server
17 June 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Siemens SINEMA Remote Connect Server
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2022-27220 CVE-2022-27219
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-22-167-07
Comment: CVSS (Max): 4.2 CVE-2022-27220 (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
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ICS Advisory (ICSA-22-167-07)
Siemens SINEMA Remote Connect Server
Original release date: June 16, 2022
Legal Notice
All information products included in https://us-cert.cisa.gov/ics are provided
"as is" for informational purposes only. The Department of Homeland Security
(DHS) does not provide any warranties of any kind regarding any information
contained within. DHS does not endorse any commercial product or service,
referenced in this product or otherwise. Further dissemination of this product
is governed by the Traffic Light Protocol (TLP) marking in the header. For more
information about TLP, see https://us-cert.cisa.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 4.2
o ATTENTION: Exploitable remotely
o Vendor: Siemens
o Equipment: SINEMA Remote Connect Server
o Vulnerabilities: Improperly Implemented Security Check for Standard
2. RISK EVALUATION
The affected application is missing general HTTP security headers in the web
servers configured on both Port 443 and Port 6220. This could aid attackers by
making the servers more prone to clickjacking, channel downgrade attacks, and
other similar client-based attack vectors.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Siemens reports these vulnerabilities affect the following SINEMA Remote
Connect management platform:
o SINEMA Remote Connect Server: all versions prior to v3.0 SP2
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPERLY IMPLEMENTED SECURITY CHECK FOR STANDARD CWE-358
The affected application is missing general HTTP security headers in the web
server configured on Port 443. This could aid attackers by making the servers
more prone to clickjacking, channel downgrade attacks, and other similar
client-based attack vectors.
CVE-2022-27219 has been assigned to this vulnerability. A CVSS v3 base score of
4.2 has been calculated. the CVSS vector string is ( AV:N/AC:H/PR:N/UI:R/S:U/
C:L/I:L/A:N )
3.2.2 IMPROPERLY IMPLEMENTED SECURITY CHECK FOR STANDARD CWE-358
The affected application is missing general HTTP security headers in the web
server configured on Port 6220. This could aid attackers by making the servers
more prone to clickjacking, channel downgrade attacks, and other similar
client-based attack vectors.
CVE-2022-27220 has been assigned to this vulnerability. A CVSS v3 base score of
4.2 has been calculated. the CVSS vector string is ( AV:N/AC:H/PR:N/UI:R/S:U/
C:L/I:L/A:N )
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Multiple sectors
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
Siemens reported these vulnerabilities to CISA.
4. MITIGATIONS
Siemens has released update v3.0 SP2 for the SINEMA Remote Connect Server and
recommends updating to the latest version.
As a general security measure, Siemens recommends protecting network access to
devices with appropriate mechanisms. To operate the devices in a protected IT
environment, Siemens recommends configuring the environment according to
Siemens' operational guidelines for industrial security and following
recommendations in the product manuals.
Additional information on industrial security by Siemens can be found on the
Siemens industrial security webpage .
For additional information, please refer to Siemens security advisory
SSA-911567 :
o SSA-911567: PDF Version
o SSA-911567: TXT Version
o SSA-911567: CSAF Version
CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices
on the ICS webpage on cisa.gov/ics Several recommended practices are available
for reading and download, including Improving Industrial Control Systems
Cybersecurity with Defense-in-Depth Strategies .
Additional mitigation guidance and recommended practices are publicly available
on the ICS webpage on cisa.gov/ics in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to CISA for tracking
and correlation against other incidents.
No known public exploits specifically target these vulnerabilities. These
vulnerabilities have a high attack complexity.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.
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