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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2023.0965 Advisory (icsa-23-047-06) Siemens Simcenter Femap before V2023.1 17 February 2023 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Siemens Simcenter Femap Publisher: ICS-CERT Operating System: Network Appliance Resolution: Patch/Upgrade CVE Names: CVE-2022-43397 CVE-2022-39157 Original Bulletin: https://us-cert.cisa.gov/ics/advisories/icsa-23-047-06 Comment: CVSS (Max): 7.8 CVE-2022-43397 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) CVSS Source: ICS-CERT Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-23-047-06) Siemens Simcenter Femap before V2023.1 Original release date: February 16, 2023 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/ . As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global). 1. EXECUTIVE SUMMARY o CVSS v3 7.8 o ATTENTION: Low attack complexity o Vendor: Siemens o Equipment: Simcenter Femap o Vulnerabilities: Out-of-bounds Read, Out-of-bounds Write 2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attacker to execute code in the context of the current process. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following software from Siemens is affected: o Simcenter Femap: All versions prior to V2023.1 3.2 VULNERABILITY OVERVIEW 3.2.1 OUT-OF-BOUNDS READ CWE-125 The affected application contains an out-of-bounds read past the end of an allocated structure while parsing specially crafted X_T files. This could allow an attacker to execute code in the context of the current process. CVE-2022-39157 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned. The CVSS vector string is ( CVSS:3.1/AV:L/AC:L/PR:N/UI:R /S:U/C:H/I:H/A:H ). 3.2.2 OUT-OF-BOUNDS WRITE CWE-787 The affected application contains an out-of-bounds write past the end of an allocated buffer while parsing specially crafted X_T files. This could allow an attacker to execute code in the context of the current process. CVE-2022-43397 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been assigned. The CVSS vector string is ( CVSS:3.1/AV:L/AC:L/PR:N/UI:R /S:U/C:H/I:H/A:H ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 3.4 RESEARCHER Trend Micro Zero Day Initiative reported these vulnerabilities to Siemens. Siemens reported these vulnerabilities to CISA. 4. MITIGATIONS Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk: o Simcenter Femap: Update to V2023.1 or a later version o Simcenter Femap: Avoid opening untrusted X_T files in Simcenter Femap As a general security measure, Siemens strongly recommends users 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 and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at the Siemens Industrial Security webpage . For further inquiries on security vulnerabilities in Siemens products and solutions, users should contact the Siemens ProductCERT . For more information, see the associated Siemens security advisory SSA-565356 in HTML and CSAF . CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet . o Locate control system networks and remote devices behind firewalls and isolate them from business networks. o When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices. 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 at cisa.gov/ics . Several CISA products detailing cyber defense best 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 at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies . Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. CISA also recommends users take the following measures to protect themselves from social engineering attacks: o Do not click web links or open attachments in unsolicited email messages. o Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. o Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. No known public exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely. 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. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: https://auscert.org.au/gpg-key/ iQIVAwUBY+7YBskNZI30y1K9AQikHA//RbTPNoN+I8NtvDaX2vta96U2tg+9n41h BezC3KmVqq3I1AOvuUPK2xSsSsUx88kp2VaQ5d79kGZlKLlnj45VXLBJkbXyQskz ZSY9xy+65vijisH8Y15SpVowxGze6aB2ydXc0TBzNasUjZY9B1yhoPMNRwViKReJ +wCNJbfpjwfd4zKAibr+BqptPXpKe65A7Oih8gEu8+KKnn7CbbrRNfvVqve7IIIl ZS4axbGM9rKgQKTSMUDEdTWJ37xhb0uBB78MdzLOj5uzalYO0vds4yH6eW6ROaGr a9tpWe3COgycs7cvDj6YaE92iAgZnsjmCkXZXx4FgRzc1s4uHi0/m4CujvE71H8P 7peXMJKnmwYIkn5UJKnvA3UnFu/NUujchPPbgEv9eyz+lajf+OvLiKRH9r0biWbI TAwg0o4igtnJtYkj+SZZqSkWglMc+8EPxYj8/hEKV7cIVxu65s3Xzfwl6PIkb/rD YEbBoaG+mPcmr+kFUB3atWvI6jZbjGB4Z9YFSvr4dkuha04IEMarWlbc7GYR+5c4 4I0BOoMKHw9xIA8ZvlJcMhTJrCnMWo3hVgVIch79TSvvbqA8Wty/RXL3PNWGLazK fGVKc5vwuIsNtyzua7w/DRKPNDxba4zuqnTpCZyfP1FTkndZlf/GpE5wPLLl06O9 t8Qbjk+TpvE= =Igw9 -----END PGP SIGNATURE-----