-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 # SSA-711829: Denial of Service Vulnerability in TIA Administrator Publication Date: 2022-04-12 Last Update: 2022-07-12 Current Version: 1.1 CVSS v3.1 Base Score: 7.5 SUMMARY ======= In conjunction with the installation of the affected products listed in the table below, a vulnerability in TIA Administrator occurs that could allow an unauthenticated attacker to perform a denial of service attack. Siemens has released updates for the affected products and recommends to update to the latest versions. AFFECTED PRODUCTS AND SOLUTION ============================== * SIMATIC PCS neo (Administration Console) - Affected versions: All versions < V3.1 SP1 - Remediation: Update to V3.1 SP1 or later version Apply measures described in "Industrial Security in SIMATIC PCS neo": https://support.industry.siemens.com/cs/ww/en/view/109771524/ See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109807752/ * SINETPLAN - Affected versions: All versions - Remediation: Update TIA Administrator to V1.0 SP7 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/114358/ * TIA Portal - Affected versions: V15, V15.1, V16 and V17 - Remediation: Update TIA Administrator to V1.0 SP7 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/114358/ WORKAROUNDS AND MITIGATIONS =========================== Siemens has identified the following specific workarounds and mitigations that customers can apply to reduce the risk: * Restrict access to port 8888/tcp to localhost (default) 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 =================== SIMATIC PCS neo is a distributed control system (DCS). The Siemens Network Planner (SINETPLAN) supports you as a planner of automation systems based on PROFINET. It facilitates the professional planning, calculation, and simulation of load in a PROFINET network and supports virtual commissioning of the network. SINETPLAN provides the capability to efficiently plan and layout PROFINET networks. It supports both "non-real-time communication", such as when TCP/IP data is used, as well as real-time (RT) or IRT communication. TIA Administrator is a web-based framework that can incorporate different function modules for administrative tasks, as well as functions for managing SIMATIC software and licenses. The Totally Integrated Automation Portal (TIA Portal) is a PC software that provides access to the complete range of Siemens digitalized automation services, from digital planning and integrated engineering to transparent operation. 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/. * Vulnerability CVE-2022-27194 The affected system cannot properly process specially crafted packets sent to port 8888/tcp. A remote attacker could exploit this vulnerability to cause a Denial-of-Service condition. The affected devices must be restarted manually. CVSS v3.1 Base Score: 7.5 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C CWE: CWE-400: Uncontrolled Resource Consumption ACKNOWLEDGMENTS =============== Siemens thanks the following parties for their efforts: * Peter Cheng from Elex Feigong Research Institute for coordinated disclosure ADDITIONAL INFORMATION ====================== 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 (2022-04-12): Publication Date V1.1 (2022-07-12): Added fix for SINETPLAN and TIA Portal 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://www.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. 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