AFFECTED PRODUCTS AND SOLUTION

Affected Product and Versions	Remediation
COMOS V10.2: All versions only if web components are used	Currently no fix is planned See recommendations from section Workarounds and Mitigations
COMOS V10.3: All versions < V10.3.3.3 only if web components are used	Update to V10.3.3.3 or later version https://support.industry.siemens.com/cs/ww/en/view/109808862/ See further recommendations from section Workarounds and Mitigations
COMOS V10.3: All versions >= V10.3.3.3 only if web components are used only affected by CVE-2021-37196	Currently no fix is planned See recommendations from section Workarounds and Mitigations
COMOS V10.4: All versions < V10.4.1 only if web components are used	Update to V10.4.1 or later version https://support.industry.siemens.com/cs/ww/en/view/109805632/ See further recommendations from section Workarounds and Mitigations

WORKAROUNDS AND MITIGATIONS

Siemens has identified the following specific workarounds and mitigations that customers can apply to reduce the risk:

• For COMOS V10.4.1 / V10.3.3.3 and CVE-2021-37194: Use the new whitelisting feature, to specify the filetypes that are allowed to be uploaded
• CVE-2021-37196 can be mitigated in all versions by making the root directory of the web server read only

Product specific remediations or mitigations can be found in the section Affected Products and Solution.

Please follow the General Security Recommendations.

GENERAL SECURITY RECOMMENDATIONS

As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens’ operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.

Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity

PRODUCT DESCRIPTION

COMOS is a unified data platform for collaborative plant design, operation and management that supports collecting, processing, saving, and distributing of information throughout the entire plant lifecycle.

VULNERABILITY CLASSIFICATION

The vulnerability classification has been performed by using the CVSS scoring system in version 3.1 (CVSS v3.1) (https://www.first.org/cvss). The CVSS environmental score is specific to the customer’s environment and will impact the overall CVSS score. The environmental score should therefore be individually defined by the customer to accomplish final scoring.

An additional classification has been performed using the CWE classification, a community-developed list of common software security weaknesses. This serves as a common language and as a baseline for weakness identification, mitigation, and prevention efforts. A detailed list of CWE classes can be found at: https://cwe.mitre.org/.

ACKNOWLEDGMENTS

Siemens thanks the following parties for their efforts:

• Sandro Poppi for reporting the vulnerabilities

ADDITIONAL INFORMATION

Updated general product information and user manuals are available on SIOS Portal. Please also consider the Security-relevant configuration for COMOS.

For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT:

https://www.siemens.com/cert/advisories

HISTORY DATA

V1.0 (2022-01-11): Publication Date

V1.1 (2022-02-08): Added CVE-2021-37194 and Updated Affected Products

V1.2 (2022-04-12): Updated remediation for COMOS V10.3

TERMS OF USE

Siemens Security Advisories are subject to the terms and conditions contained in Siemens’ underlying license terms or other applicable agreements previously agreed to with Siemens (hereinafter "License Terms"). To the extent applicable to information, software or documentation made available in or through a Siemens Security Advisory, the Terms of Use of Siemens’ Global Website https://new.siemens.com/terms_of_use, hereinafter "Terms of Use"), in particular Sections 8-10 of the Terms of Use, shall apply additionally. In case of conflicts, the License Terms shall prevail over the Terms of Use.