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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.0604 Advisory (icsa-21-350-16) Siemens Healthineers syngo fastView (Update A) 11 February 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Siemens Healthineers syngo fastView Publisher: ICS-CERT Operating System: Network Appliance Resolution: Patch/Upgrade CVE Names: CVE-2021-45465 CVE-2021-42028 CVE-2021-40367 Original Bulletin: https://us-cert.cisa.gov/ics/advisories/icsa-21-350-16 Comment: CVSS (Max): 7.8 CVE-2021-40367 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) CVSS Source: ICS-CERT - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-21-350-16) Siemens Healthineers syngo fastView (Update A) Original release date: February 10, 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 7.8 o ATTENTION: Low attack complexity o Vendor: Siemens Healthineers, a subsidiary of Siemens o Equipment: syngo fastView - --------- Begin Update A Part 1 of 2 -------- o Vulnerabilities: Out-of-bounds Write, Write-what-where Condition - --------- End Update A Part 1 of 2 -------- 2. UPDATE INFORMATION This updated advisory is a follow-up to the original advisory titled ICSA-21-350-16 Siemens Healthineers syngo fastView that was published December 16, 2021, to the ICS webpage on www.cisa.gov/uscert. 3. RISK EVALUATION Successful exploitation of these vulnerabilities could lead to a crash of the application or arbitrary code execution. 4. TECHNICAL DETAILS 4.1 AFFECTED PRODUCTS The following versions of syngo fastView, a software for digital imaging and communications, are affected: o Syngo fastView: All versions 4.2 VULNERABILITY OVERVIEW 4.2.1 OUT-OF-BOUNDS WRITE CWE-787 The affected application lacks proper validation of user-supplied data when parsing DICOM files, which could result in an out-of-bounds write past the end of an allocated structure. An attacker could leverage this vulnerability to execute code in the context of the current process. CVE-2021-40367 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/ C:H/I:H/A:H ). 4.2.2 OUT-OF-BOUNDS WRITE CWE-787 The affected application lacks proper validation of user-supplied data when parsing BMP files, which could result in an out-of-bounds write past the end of an allocated structure. An attacker could leverage this vulnerability to execute code in the context of the current process. CVE-2021-42028 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/ C:H/I:H/A:H ). - --------- Begin Update A Part 2 of 2 -------- 4.2.3 WRITE-WHAT-WHERE CONDITION CWE-123 The affected application lacks proper validation of user-supplied data when parsing BMP files. This could result in a write-what-where condition and an attacker could leverage this vulnerability to execute code in the context of the current process. CVE-2021-45465 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/ C:H/I:H/A:H ). - --------- End Update A Part 2 of 2 -------- 4.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Healthcare and Public Health o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Germany 4.4 RESEARCHER Tran Van Khang - khangkito (VinCSS) working with Trend Micro Zero Day Initiative reported these vulnerabilities to Siemens and CISA. 5. MITIGATIONS Siemens Healthineers has identified the following specific workarounds and mitigations that customers can apply to reduce the risk: o Download syngo fastView only from the SHS official page . o Avoid opening untrusted files from unknown sources in syngo fastView. o Remove syngo fastView after viewing the required files. For additional information, please refer to Siemens Healthineers' Security Advisory SHSA-688797 In addition, Siemens Healthineers recommends the following: o Ensure appropriate backups and system restoration procedures are in place. o Securely delete any backup files that are no longer needed. o For specific patch and remediation guidance information contact a Siemens Healthineers Customer Service Engineer, portal, or the Regional Support Center. For further inquiries on security vulnerabilities in Siemens Healthineers products and solutions, please contact Siemens Healthineers . CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. 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 . 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 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 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. 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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: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYgWwNONLKJtyKPYoAQg5Gw/+JAWB+twkWiuHhF6nB0ncmmuTkyVSwqSL EHYSStBjpAtWmybrh3bquYcBel+K1HuCO+2KK5+JKhF64B7K3k/72fxefUtYRcTs EYMcfIbISY25YEQmbZWF3GaLDDYWxI3Lyv4JD4kwra7ZIdpkq+YMT4Z3tLnXZCiX XHJfm73cg4c0DzhIcg8+pDqLKiuePrXVhojzhf3xXQ5hS+lLKc3oYnI0XCn1YPG8 2p53A45QZCwGXVRoOR5tUuLExznukyFgnWGjydSW7MF0iMaN52sBF/dqugTUWJUY WZkeN/3CyOITPFf/E/Zwrr1d20SYvO4TE4TAneRaSQmDjGch9QOWCUBtQBM5jZx8 ateBGhRNgxQA/YuTK7WGUhgkG/A60SLJ823X0wxpO8xmMFee9BRNXx5GQw3ZW7Kg psGl0GuNPOq+K5XFx9sRg2E80xP23saM/F43T+wKoZKVBcIgUAAuaGfj5cim4MLb DWkcodI64ULXs8xZQEvIYwJ9jFlknDK+hpHzLkblTK1LUhKfGGiloMhnr7galMpx GQA92GYr5xrg9Rs17/BumPvgZnoe4mjrtRtxuJHhCmjwjgE787iG9+tT4qkw13rR TOqR4TtMAjUa3GV+jqh0PLvvrtYvehGdfGs7OMniQk67D4R90WMU9EL5/AWW960P mz+u2ILknWY= =aqHi -----END PGP SIGNATURE-----