-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 # SSA-552874: Denial of Service Vulnerability in SIPROTEC 5 Devices Publication Date: 2022-12-13 Last Update: 2024-05-14 Current Version: 1.4 CVSS v3.1 Base Score: 5.3 SUMMARY ======= Devices of the SIPROTEC 5 family contain a vulnerability related to secure client-initiated renegotiation. This could allow an unauthenticated attacker to cause a denial of service condition for the duration of the attack. Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens is preparing further fix versions and recommends specific countermeasures for products where fixes are not, or not yet available. AFFECTED PRODUCTS AND SOLUTION ============================== * SIPROTEC 5 6MD84 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109814150/ * SIPROTEC 5 6MD85 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 6MD85 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757428/ * SIPROTEC 5 6MD86 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 6MD86 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757428/ * SIPROTEC 5 6MD89 (CP300) - Affected versions: All versions < V9.64 - Remediation: Update to V9.64 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109742950/ * SIPROTEC 5 6MU85 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109765263/ * SIPROTEC 5 7KE85 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7KE85 (CP300) - Affected versions: All versions < V9.64 - Remediation: Update to V9.64 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757430/ * SIPROTEC 5 7SA82 (CP100) - Affected versions: All versions - Remediation: Currently no fix is available See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SA82 (CP150) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757433/ * SIPROTEC 5 7SA84 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SA86 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SA86 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757433/ * SIPROTEC 5 7SA87 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SA87 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757433/ * SIPROTEC 5 7SD82 (CP100) - Affected versions: All versions - Remediation: Currently no fix is available See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SD82 (CP150) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757433/ * SIPROTEC 5 7SD84 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SD86 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SD86 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757433/ * SIPROTEC 5 7SD87 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SD87 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757433/ * SIPROTEC 5 7SJ81 (CP100) - Affected versions: All versions < V8.89 - Remediation: Update to V8.89 or later V8.xx version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109751934/ * SIPROTEC 5 7SJ81 (CP150) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109751934/ * SIPROTEC 5 7SJ82 (CP100) - Affected versions: All versions < V8.89 - Remediation: Update to V8.89 or later V8.xx version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109751934/ * SIPROTEC 5 7SJ82 (CP150) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109751934/ * SIPROTEC 5 7SJ85 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SJ85 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109751934/ * SIPROTEC 5 7SJ86 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SJ86 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757433/ * SIPROTEC 5 7SK82 (CP100) - Affected versions: All versions < V8.89 - Remediation: Update to V8.89 or later V8.xx version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757434/ * SIPROTEC 5 7SK82 (CP150) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757434/ * SIPROTEC 5 7SK85 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SK85 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757434/ * SIPROTEC 5 7SL82 (CP100) - Affected versions: All versions - Remediation: Currently no fix is available See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SL82 (CP150) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757433/ * SIPROTEC 5 7SL86 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SL86 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757433/ * SIPROTEC 5 7SL87 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SL87 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757433/ * SIPROTEC 5 7SS85 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7SS85 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757429/ * SIPROTEC 5 7ST85 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7ST85 (CP300) - Affected versions: All versions < V9.64 - Remediation: Update to V9.64 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109740299/ * SIPROTEC 5 7ST86 (CP300) - Affected versions: All versions < V9.64 - Remediation: Update to V9.64 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109768428/ * SIPROTEC 5 7SX82 (CP150) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109768011/ * SIPROTEC 5 7SX85 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109768011/ * SIPROTEC 5 7UM85 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757431/ * SIPROTEC 5 7UT82 (CP100) - Affected versions: All versions - Remediation: Currently no fix is available See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7UT82 (CP150) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757438/ * SIPROTEC 5 7UT85 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7UT85 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757438/ * SIPROTEC 5 7UT86 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7UT86 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757438/ * SIPROTEC 5 7UT87 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7UT87 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757438/ * SIPROTEC 5 7VE85 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109749865/ * SIPROTEC 5 7VK87 (CP200) - Affected versions: All versions - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 7VK87 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109757433/ * SIPROTEC 5 7VU85 (CP300) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109800399/ * SIPROTEC 5 Communication Module ETH-BA-2EL - Affected versions: All versions < V8.89 installed on CP100 devices - Remediation: Update to V8.89 or later V8.xx version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109740816/ * SIPROTEC 5 Communication Module ETH-BA-2EL - Affected versions: All versions < V9.50 installed on CP150 and CP300 devices - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109740816/ * SIPROTEC 5 Communication Module ETH-BA-2EL - Affected versions: All versions installed on CP200 devices - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 Communication Module ETH-BB-2FO - Affected versions: All versions < V8.89 installed on CP100 devices - Remediation: Update to V8.89 or later V8.xx version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109740816/ * SIPROTEC 5 Communication Module ETH-BB-2FO - Affected versions: All versions < V9.50 installed on CP150 and CP300 devices - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109740816/ * SIPROTEC 5 Communication Module ETH-BB-2FO - Affected versions: All versions installed on CP200 devices - Remediation: Currently no fix is planned See recommendations from section "Workarounds and Mitigations" * SIPROTEC 5 Communication Module ETH-BD-2FO - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109740816/ * SIPROTEC 5 Compact 7SX800 (CP050) - Affected versions: All versions < V9.50 - Remediation: Update to V9.50 or later version See further recommendations from section "Workarounds and Mitigations" - Download: https://support.industry.siemens.com/cs/ww/en/view/109796884/ WORKAROUNDS AND MITIGATIONS =========================== Siemens has identified the following specific workarounds and mitigations that customers can apply to reduce the risk: * Restrict access to port 443/tcp and 4443/tcp to trusted IP addresses 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 ================================ Operators of critical power systems (e.g. TSOs or DSOs) worldwide are usually required by regulations to build resilience into the power grids by applying multi-level redundant secondary protection schemes. It is therefore recommended that the operators check whether appropriate resilient protection measures are in place. The risk of cyber incidents impacting the grid's reliability can thus be minimized by virtue of the grid design. Siemens strongly recommends applying the provided security updates using the corresponding tooling and documented procedures made available with the product. If supported by the product, an automated means to apply the security updates across multiple product instances may be used. Siemens strongly recommends prior validation of any security update before being applied, and supervision by trained staff of the update process in the target environment. As a general security measure Siemens strongly recommends to protect network access with appropriate mechanisms (e.g. firewalls, segmentation, VPN). It is advised to configure the environment according to our operational guidelines in order to run the devices in a protected IT environment. Recommended security guidelines can be found at: https://www.siemens.com/gridsecurity PRODUCT DESCRIPTION =================== SIPROTEC 5 and SIPROTEC 4 devices provide a range of integrated protection, control, measurement, and automation functions for electrical substations and other fields of application. VULNERABILITY DESCRIPTION ========================= This chapter describes all vulnerabilities (CVE-IDs) addressed in this security advisory. Wherever applicable, it also documents the product-specific impact of the individual vulnerabilities. * Vulnerability CVE-2022-45044 Affected devices do not properly restrict secure client-initiated renegotiations within the SSL and TLS protocols. This could allow an attacker to create a denial of service condition on the ports 443/tcp and 4443/tcp for the duration of the attack. CVSS v3.1 Base Score: 5.3 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:T/RC:C CWE: CWE-400: Uncontrolled Resource Consumption 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 (2022-12-13): Publication Date V1.1 (2023-05-09): Added fix for multiple devices; Corrected affected products list V1.2 (2023-09-12): Added fix for SIPROTEC 5 6MD89 (CP300), SIPROTEC 5 7KE85 (CP300), SIPROTEC 5 7ST85 (CP300) and SIPROTEC 5 7ST86 (CP300) V1.3 (2024-03-12): Adjusted fix version for SIPROTEC 5 6MD89 (CP300), SIPROTEC 5 7KE85 (CP300), SIPROTEC 5 7ST85 (CP300) and SIPROTEC 5 7ST86 (CP300) V1.4 (2024-05-14): Added fix for SIPROTEC 5 7SJ81 (CP100), SIPROTEC 5 7SJ82 (CP100), SIPROTEC 5 7SK82 (CP100), SIPROTEC 5 Communication Module ETH-BA-2EL (installed on CP100 devices), SIPROTEC 5 Communication Module ETH-BB-2FO (installed on CP100 devices); Clarified that currently no fix is available for SIPROTEC 5 7SA82 (CP100), SIPROTEC 5 7SD82 (CP100), SIPROTEC 5 7SL82 (CP100), SIPROTEC 5 7UT82 (CP100) 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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