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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.2283 Multiple vulnerabilities have been identified in Medtronic MyCareLink 24950 Patient Monitor 8 August 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Medtronic MyCareLink 24950 Patient Monitor Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Access Privileged Data -- Console/Physical Provide Misleading Information -- Console/Physical Resolution: Patch/Upgrade CVE Names: CVE-2018-10626 CVE-2018-10622 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSMA-18-219-01 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSMA-18-219-01) Medtronic MyCareLink 24950 Patient Monitor Original release date: August 07, 2018 Legal Notice All information products included in http://ics-cert.us-cert.gov 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 http://www.us-cert.gov/tlp/. 1. EXECUTIVE SUMMARY CVSS v3 4.9 Vendor: Medtronic Equipment: MyCareLink Patient Monitor Vulnerabilities: Insufficient Verification of Data Authenticity, Storing Passwords in a Recoverable Format 2. RISK EVALUATION Successful exploitation of these vulnerabilities may allow an attacker with physical access to obtain per-product credentials that are utilized to authenticate data uploads and encrypt data at rest. Additionally, an attacker with access to a set of these credentials and additional identifiers can upload invalid data to the Medtronic CareLink network. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of the Medtronic MyCareLink 24950 Patient Monitor, are affected: 24950 MyCareLink Monitor, all versions, 24952 MyCareLink Monitor, all versions. 3.2 VULNERABILITY OVERVIEW 3.2.1 INSUFFICIENT VERIFICATION OF DATA AUTHENTICITY CWE-345 The affected products update service does not sufficiently verify the authenticity of the data uploaded. An attacker who obtains per-product credentials from the monitor and paired implantable cardiac device information can potentially upload invalid data to the Medtronic CareLink network. CVE-2018-10626 has been assigned to this vulnerability. A CVSS v3 base score of 4.4 has been calculated; the CVSS vector string is (AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N). 3.2.2 STORING PASSWORDS IN A RECOVERABLE FORMAT CWE-257 The affected products use per-product credentials that are stored in a recoverable format. An attacker can use these credentials for network authentication and encryption of local data at rest. CVE-2018-10622 has been assigned to this vulnerability. A CVSS v3 base score of 4.9 has been calculated; the CVSS vector string is (AV:P/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N). 3.3 BACKGROUND CRITICAL INFRASTRUCTURE SECTORS: Healthcare and Public Health COUNTRIES/AREAS DEPLOYED: Worldwide COMPANY HEADQUARTERS LOCATION: Ireland 3.4 RESEARCHER Billy Rios, Jesse Young, and Jonathan Butts of Whitescope LLC reported these vulnerabilities to NCCIC. 4. MITIGATIONS Medtronic has made server-side updates to address the insufficient verification vulnerability identified in this advisory. Medtronic is implementing additional server-side mitigations to enhance data integrity and authenticity. Medtronic recommends users take additional defensive measures to minimize the risk of exploitation. Specifically, users should: Maintain good physical control over the home monitor. Only use home monitors obtained directly from their healthcare provider or a Medtronic representative to ensure integrity of the system. Medtronic has released additional patient focused information, at the following location: https://www.medtronic.com/security NCCIC recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should: Do not upload and run files without verifying the integrity of the file. Interact with, and only obtain files, software, and software patches from trustworthy reputable sources. Minimize network exposure for all medical devices and/or systems, and ensure that they are not accessible from the Internet. NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. 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-CERT website 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 NCCIC for tracking and correlation against other incidents. No known public exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely. High skill level is needed to exploit. Contact Information For any questions related to this report, please contact the NCCIC at: Email: NCCICCUSTOMERSERVICE@hq.dhs.gov Toll Free: 1-888-282-0870 For industrial control systems cybersecurity information: http://ics-cert.us-cert.gov or incident reporting: https://ics-cert.us-cert.gov/Report-Incident? The NCCIC 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: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBW2os0WaOgq3Tt24GAQgpgA/+K4nMD6P10gAk2kO0MUa8aA2wNYVTiFqz S6hxhkNFPl/lyk71HVIK+QtGvQHK4Kau8t0/KkLOV5Tr2P0Pm/P5ZY0qHUQvqgSQ UGXhpxR9MM4iVakW99qmpX3IqfNCEqqMItUAB+eQlvoC80uJXO+i5m5lxtX7cQLf 2GwVKLvQkRlwDR6+zpcxXK2SXmqEFHwwAjxugLjcp+yXNmtMZPD+mXwsusxcrZun VbcWSaXOTPA/XMKck3JA99ikGzFHoiA2ZcWc/4CLNUo3t3Nn4Bx/utFxqW42uZV8 27RWDjYo4vzh2ooea2yDSpvN8BgqpWh5oaYRC+bV5K6wzEeimUDKtn+G+TUc4CMt vgvI0dQn74xvTMObL901nohwvVrgH2sgzi72Wgiff+OWUu6sGQmGjUONpCa/PKTP XE2ZLVSyR9nIlhJ2LatnphftJPa3MCE3QN+SgaegnviDUjd65x8+xEvFyvL85Ido IO71vDoUl7069swYgfdVZUFqRmOfeAAfV+cOzUF2sj/kNNMzYaSDtgZhRxdvpYWJ sIyc8//03V4uGg6lHRaCQ+OyAJhjhwv3roJHzRdl3UORRYZ3QA0zEhiTC6l21Qnp Xo9yvsgZroQ5pMMZcqP5lvA0LVe6lY0hOHRbRvXLlgSgYtStK+KOpKM3JXnKcg7T BSYDbY2wets= =IbZq -----END PGP SIGNATURE-----