CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:A/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
29.5%
Successful exploitation of these vulnerabilities could allow an attacker with physical access to the CardioMessenger to obtain sensitive data, obtain transmitted medical data from implanted cardiac devices with the implant’s serial number or impact Cardio Messenger II product functionality. Successful exploitation of these vulnerabilities could allow an attacker with adjacent access to influence communications between the Home Monitoring Unit (HMU) and the Access Point Name (APN) gateway network.
The following versions of the CardioMessenger II, a home monitoring unit, are affected:
The affected products do not properly enforce mutual authentication with the BIOTRONIK Remote Communication infrastructure.
CVE-2019-18246 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).
The affected products transmit credentials in cleartext prior to switching to an encrypted communication channel. An attacker can disclose the product’s client credentials for connecting to the BIOTRONIK Remote Communication infrastructure.
CVE-2019-18248 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).
The affected products allow credential reuse for multiple authentication purposes. An attacker with adjacent access to the CardioMessenger can disclose its credentials used for connecting to the BIOTRONIK Remote Communication infrastructure.
CVE-2019-18252 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).
The affected products do not encrypt sensitive information while at rest. An attacker with physical access to the CardioMessenger can disclose medical measurement data and the serial number from the implanted cardiac device the CardioMessenger is paired with.
CVE-2019-18254 has been assigned to this vulnerability. A CVSS v3 base score of 4.6 has been calculated; the CVSS vector string is (AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
The affected products use individual per-device credentials that are stored in a recoverable format. An attacker with physical access to the CardioMessenger can use these credentials for network authentication and decryption of local data in transit.
CVE-2019-18256 has been assigned to this vulnerability. A CVSS v3 base score of 4.6 has been calculated; the CVSS vector string is (AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
Guillaume Bour, Anniken Wium Lie, and Marie Moe reported these vulnerabilities to CISA.
BIOTRONIK reports they will not be issuing a product security update; however, BIOTRONIK has identified compensating controls which have been put place that reduce the risk of exploitation and prevent patient safety risks. BIOTRONIK assessed these vulnerabilities and determined no new potential safety risks exist.
BIOTRONIK recommends users take the following defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
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 us-cert.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 us-cert.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.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-18246
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-18248
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-18252
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-18254
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-18256
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-medical-advisories/icsma-20-170-05
cwe.mitre.org/data/definitions/257.html
cwe.mitre.org/data/definitions/287.html
cwe.mitre.org/data/definitions/287.html
cwe.mitre.org/data/definitions/311.html
cwe.mitre.org/data/definitions/319.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=BIOTRONIK%20CardioMessenger%20II+https://www.cisa.gov/news-events/ics-medical-advisories/icsma-20-170-05
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
www.facebook.com/sharer/sharer.php?u=https://www.cisa.gov/news-events/ics-medical-advisories/icsma-20-170-05&title=BIOTRONIK%20CardioMessenger%20II
www.fda.gov/medical-devices/digital-health/cybersecurity
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-medical-advisories/icsma-20-170-05
www.oig.dhs.gov/
www.us-cert.gov/ics
www.us-cert.gov/ics
www.us-cert.gov/ics/recommended-practices
www.us-cert.gov/ics/tips/ICS-TIP-12-146-01B
www.us-cert.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=BIOTRONIK%20CardioMessenger%20II&body=www.cisa.gov/news-events/ics-medical-advisories/icsma-20-170-05
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:A/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
29.5%