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AUSCERT External Security Bulletin Redistribution
ESB-2018.2286
Multiple vulnerabilities have been identified in Medtronic
MiniMed 508 Insulin Pump
8 August 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: Medtronic MiniMed 508 Insulin Pump
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Provide Misleading Information -- Remote/Unauthenticated
Access Confidential Data -- Remote with User Interaction
Resolution: Mitigation
CVE Names: CVE-2018-14781 CVE-2018-10634
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSMA-18-219-02
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Advisory (ICSMA-18-219-02)
Medtronic MiniMed 508 Insulin Pump
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 5.3
Vendor: Medtronic
Equipment: MiniMed 508 Insulin Pump
Vulnerabilities: Cleartext Transmission of Sensitive Information,
Authentication Bypass by Capture-replay
2. RISK EVALUATION
Successful exploitation of these vulnerabilities may allow an attacker to
replay captured wireless communications and cause an insulin (bolus) delivery.
This is only possible when non-default options are configured. Additionally,
the pump will annunciate this by providing a physical alert, and the user has
the capability to suspend the bolus delivery.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following supported Medtronic products are affected:
MMT - 508 MiniMed insulin pump,
MMT - 522 / MMT - 722 Paradigm REAL-TIME,
MMT - 523 / MMT - 723 Paradigm Revel,
MMT - 523K / MMT - 723K Paradigm Revel, and
MMT - 551 / MMT - 751 MiniMed 530G
3.2 VULNERABILITY OVERVIEW
3.2.1 CLEARTEXT TRANSMISSION OF SENSITIVE INFORMATION CWE-319
Communications between the pump and wireless accessories are transmitted in
cleartext. A sufficiently skilled attacker could capture these transmissions
and extract sensitive information, such as device serial numbers.
CVE-2018-10634 has been assigned to this vulnerability. A CVSS v3 base score
of 4.8 has been assigned; the CVSS vector string is
(AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N).
3.2.2 AUTHENTICATION BYPASS BY CAPTURE-REPLAY CWE-294
The models identified above, when paired with a remote controller and having
the easy bolus and remote bolus options enabled (non-default), are vulnerable
to a capture-replay attack. An attacker can capture the wireless transmissions
between the remote controller and the pump and replay them to cause an insulin
(bolus) delivery.
CVE-2018-14781 has been assigned to this vulnerability. A CVSS v3 base score
of 5.3 has been assigned; the CVSS vector string is
(AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:H/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 will not be developing a product update to address these
vulnerabilities. If a user has never programmed or used a remote controller,
they are not susceptible to this attack. Additionally, if the user disables
the remote option or turns off the easy bolus option in their pump, they are
not susceptible to this attack.
The easy bolus and remote options are turned off in the pump by default. In
cases where users want to continue to use the convenience of the remote
controller, as a precaution to this attack, Medtronic recommends the easy
bolus is turned off when they are not intending to use remote bolus option;
and when the easy bolus option is turned on, be attentive to pump alerts.
Medtronic has released additional patient focused information, at the
following location:
https://www.medtronic.com/security
Additionally, Medtronic will be sending a letter to all the patients who have
acquired these remote controllers over the past four years to inform them
about the security risks and compensating controls.
NCCIC recommends that users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. Specifically, users should:
Minimize network exposure for all control system devices and/or systems, and
ensure that they are not accessible from the Internet.
Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
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.
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