5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.2 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
38.5%
This updated advisory is a follow-up to the advisory update titled ICSA-20-170-02 Baxter PrismaFlex and PrisMax (Update A) that was published June 23, 2020, on the ICS webpage on us-cert.gov.
Successful exploitation of these vulnerabilities may allow an attacker with network access to view and alter sensitive data.
The following models and versions of Baxter medical systems, are affected:
The affected devices do not implement data-in-transit encryption (e.g., TLS/SSL) when configured to send treatment data to a PDMS (Patient Data Management System) or an EMR (Electronic Medical Record) system. An attacker could observe sensitive data sent from the device.
CVE-2020-12036 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N).
The affected devices do not require authentication when configured to send treatment data to a PDMS or an EMR system. This could allow an attacker to modify treatment status information.
CVE-2020-12035 has been assigned to this vulnerability. A CVSS v3 base score of 7.6 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L).
The PrismaFlex device contains a hard-coded service password that provides access to biomedical information, device settings, calibration settings, and network configuration. This could allow an attacker to modify device settings and calibration.
CVE-2020-12037 has been assigned to this vulnerability. A CVSS v3 base score of 5.4 has been calculated; the CVSS vector string is (AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L).
Baxter reported these vulnerabilities to CISA.
--------- Begin Update B Part 1 of 1 ---------
Prismaflex versions SW 8.2x include the option to set a device specific service password. Note: Prismaflex Versions SW 8.2x are not available in all regions, including the United States.
--------- End Update B Part 1 of 1 ---------
For PrisMax, Baxter recommends users upgrade to PrisMaxv3 with DCM (Digital Communication Module), which supports mutually authenticated TLS tunnel to a PDMS or EMR system capable of implementing the latest TLS 1.2.
Additionally, Baxter recommends users of affected devices implement the following best practices:
Baxter also recommends that if a PDMS or EMR system is used with the affected devices, users should verify compatibility between the two systems. Users should also identify, analyze, evaluate, and control all risks associated with integration of medical devices in an enterprise network. Subsequent changes to the enterprise network could introduce new risks and require new analysis. The use of a PDMS or EMR system not compatible with the PrismaFlex and PrisMax systems can result in the presentation of erroneous data.
For additional information please see the Baxter Product Security Bulletins for PrismaFlex and PrisMax.
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
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-2020-12035
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12036
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-12037
cwe.mitre.org/data/definitions/259.html
cwe.mitre.org/data/definitions/287.html
cwe.mitre.org/data/definitions/319.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
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www.baxter.com/product-security#additionalresources
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www.fda.gov/medical-devices/digital-health/cybersecurity
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L
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www.us-cert.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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mailto:?subject=Baxter%20PrismaFlex%20and%20PrisMax%20%28Update%20B%29&body=www.cisa.gov/news-events/ics-medical-advisories/icsma-20-170-02
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:N/C:P/I:N/A:N
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.2 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
38.5%