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AUSCERT External Security Bulletin Redistribution
ESB-2021.3826
Advisory (icsma-21-313-01) Philips MRI 1.5T and 3T
10 November 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Philips MRI 1.5T and 3T
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Modify Arbitrary Files -- Existing Account
Access Confidential Data -- Existing Account
Unauthorised Access -- Existing Account
Resolution: Mitigation
CVE Names: CVE-2021-3085 CVE-2021-3084 CVE-2021-3083
Reference: ESB-2021.3630
ESB-2021.3578
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsma-21-313-01
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ICS Medical Advisory (ICSMA-21-313-01)
Philips MRI 1.5T and 3T
Original release date: November 09, 2021
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 6.2
o ATTENTION: Low attack complexity
o Vendor: Philips
o Equipment: MRI 1.5T and 3T
o Vulnerabilities: Improper Access Control, Incorrect Ownership Assignment,
Exposure of Sensitive Information to an Unauthorized Actor
2. RISK EVALUATION
Successful exploitation of these vulnerabilities may allow an unauthorized
attacker access to execute software, modify system configuration, view/update
files, and export data (including patient data) to an untrusted environment.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Philips reports the vulnerabilities affect the following MRI products:
o MRI 1.5T: Version 5.x.x
o MRI 3T: Version 5.x.x
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER ACCESS CONTROL CWE-284
The software does not restrict or incorrectly restricts access to a resource
from an unauthorized actor.
CVE-2021-3083 has been assigned to this vulnerability. A CVSS v3 base score of
6.2 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:N/S:U/
C:H/I:N/A:N ).
3.2.2 INCORRECT OWNERSHIP ASSIGNMENT CWE-708
The software assigns an owner who is outside the intended control sphere to a
resource.
CVE-2021-3085 has been assigned to this vulnerability. A CVSS v3 base score of
6.2 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:N/S:U/
C:H/I:N/A:N ).
3.2.3 EXPOSURE OF SENSITIVE INFORMATION TO AN UNAUTHORIZED ACTOR CWE-200
The product exposes sensitive information to an actor not explicitly authorized
to have access.
CVE-2021-3084 has been assigned to this vulnerability. A CVSS v3 base score of
6.2 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:N/S:U/
C:H/I:N/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Healthcare and Public Health
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Netherlands
3.4 RESEARCHER
Michael Aguilar, a Secureworks Adversary Group consultant, reported these
vulnerabilities to Philips.
4. MITIGATIONS
Philips plans a new release to remediate these vulnerabilities by October 2022.
As an interim mitigation to these vulnerabilities, Philips recommends the
following:
o Users should operate all Philips deployed and supported products within
Philips authorized specifications, including physical and logical controls.
Only allowed personnel are permitted in the vicinity of the product. Refer
to the Philips instructions for use (IFU) available on InCenter .
Users with questions about their specific MRI product should contact a Philips
service support team or regional service support. Philips contact information
is available at the Philips customer service solutions website or by calling
1-800-722-9377.
For more information regarding these vulnerabilities, see the Philips product
security advisory website.
Users can also visit the Philips product security website for the latest
security information for Philips products.
CISA recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. Specifically, users should:
o Implement physical security measures to limit or control access to critical
systems.
o Restrict system access to authorized personnel only and follow a least
privilege approach.
o Apply defense-in-depth strategies.
o Disable unnecessary accounts and services.
o Where additional information is needed, refer to existing cybersecurity in
medical device guidance issued by the FDA .
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.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 us-cert.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.
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