CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
23.4%
--------- Begin Update A Part 1 of 3 ----------
--------- End Update A Part 1 of 3 ----------
This updated advisory is a follow-up to the original advisory titled ICSMA-18-123-01 Philipsβ Brilliance Computed Tomography (CT) System that was published May 3, 2018, on the ICS webpage on us-cert.gov.
Successful exploitation of these vulnerabilities may allow an attacker to attain elevated privileges and access unauthorized system resources, including access to execute software or to view/update files including patient health information (PHI), directories, or system configuration. This could impact system confidentiality, system integrity, or system availability. Philips has received no reports of exploitation or incidents from clinical associated with these vulnerabilities.
--------- Begin Update A Part 2 of 3 ----------
--------- End Update A Part 2 of 3 ----------
Philips Brilliance CT devices operate user functions from within a contained kiosk in a Microsoft Windows operating system. Windows boots by default with elevated Windows privileges, enabling a kiosk application, user, or an attacker to potentially attain unauthorized elevated privileges. Also, attackers may gain access to unauthorized resources from the underlying Windows operating system.
CVE-2018-8853 has been assigned to this vulnerability. A CVSS v3 base score of 6.1 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L).
Vulnerabilities within the Brilliance CT kiosk environment could enable a limited-access kiosk user or an unauthorized attacker to break-out from the containment of the kiosk environment, attain elevated privileges from the underlying Windows OS, and access unauthorized resources from the operating system.
CVE-2018-8861 has been assigned to this vulnerability. A CVSS v3 base score of 6.1 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L).
The software contains fixed credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communication to external components, or encryption of internal data. An attacker could compromise these credentials and gain access to the system.
CVE-2018-8857 has been assigned to this vulnerability. A CVSS v3 base score of 8.4 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Philips reported these vulnerabilities to NCCIC.
Philips has identified the following guidance and controlling risk mitigations:
Philips has also remediated hard-coded credential vulnerabilities for Brilliance iCT 4.x and above versions. The Philips iCT-iPatient (v4.x) family Instructions for Use (IFU) refers to the ability to manage credentials and is accessible to entitled users from the Philips InCenter.
--------- Begin Update A Part 3 of 3 --------
As the MX8000 Dual EXP has been out of support since 2017, Philips recommends a replacement based on user need. Please contact a local sales organization.
Philips will be further assessing options for remediation with future product introductions and/or upgrades across the CT & AMI modalities to address identified security vulnerabilities. Users with questions about their specific Brilliance CT or MX8000 Dual EXP products should contact a Philips service support team.
--------- End Update A Part 3 of 3 --------
The Philipsβ advisory is available at the following URL:
<http://www.philips.com/productsecurity> (link is external)
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should follow these measures:
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-12-146-01BβTargeted 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.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-8853
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-8857
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-8857
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-8861
www.philips.com/productsecurity
www.usa.philips.com/healthcare/solutions/customer-service-solutions
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-medical-advisories/icsma-18-123-01
cwe.mitre.org/data/definitions/250.html
cwe.mitre.org/data/definitions/668.html
cwe.mitre.org/data/definitions/798.html
incenter.medical.philips.com
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
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www.dhs.gov/performance-financial-reports
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
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www.oig.dhs.gov/
www.us-cert.gov/cas/tips/ST04-014.html
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/reading_room/emailscams_0905.pdf
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=Philips%20Brilliance%20Computed%20Tomography%20%28CT%29%20System%20%28Update%20A%29&body=www.cisa.gov/news-events/ics-medical-advisories/icsma-18-123-01
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
23.4%