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AUSCERT External Security Bulletin Redistribution
Multiple vulnerabilities have been identified in Medtronic
MyCareLink 24950 Patient Monitor
8 August 2018
AusCERT Security Bulletin Summary
Product: Medtronic MyCareLink 24950 Patient Monitor
Operating System: Network Appliance
Impact/Access: Access Privileged Data -- Console/Physical
Provide Misleading Information -- Console/Physical
CVE Names: CVE-2018-10626 CVE-2018-10622
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Medtronic MyCareLink 24950 Patient Monitor
Original release date: August 07, 2018
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1. EXECUTIVE SUMMARY
CVSS v3 4.9
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
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
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
CRITICAL INFRASTRUCTURE SECTORS: Healthcare and Public Health
COUNTRIES/AREAS DEPLOYED: Worldwide
COMPANY HEADQUARTERS LOCATION: Ireland
Billy Rios, Jesse Young, and Jonathan Butts of Whitescope LLC reported these
vulnerabilities to NCCIC.
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
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
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
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
For any questions related to this report, please contact the NCCIC at:
Toll Free: 1-888-282-0870
For industrial control systems cybersecurity information:
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
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