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AUSCERT External Security Bulletin Redistribution
ESB-2021.3947
Advisory (icsma-21-322-02) Philips Patient Information
Center iX (PIC iX) and Efficia CM Series
19 November 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Philips Patient Information Center iX (PIC iX) and Efficia CM Series
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Mitigation
CVE Names: CVE-2021-43552 CVE-2021-43550 CVE-2021-43548
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsma-21-322-02
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ICS Medical Advisory (ICSMA-21-322-02)
Philips Patient Information Center iX (PIC iX) and Efficia CM Series
Original release date: November 18, 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 6.5
o ATTENTION: Exploitable from adjacent network/low attack complexity
o Vendor: Philips
o Equipment: Patient Information Center iX (PIC iX) and Efficia CM Series
o Vulnerabilities: Improper Input Validation, Use of Hard-coded Cryptographic
Key, Use of a Broken or Risky Cryptographic Algorithm
2. RISK EVALUATION
Successful exploitation of these vulnerabilities may allow an attacker
unauthorized access to data (including patient data) and create a denial of
service resulting in temporary interruption of viewing physiological data at
the central station. Exploitation does not enable modification or change to
point-of-care devices.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Patient Information Center iX (PIC iX) and Efficia CM
Series are affected:
o Patient Information Center iX (PIC iX): Versions B.02, C.02, C.03
o Efficia CM Series: Revisions A.01 to C.0x and 4.0
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER INPUT VALIDATION CWE-20
Patient Information Center iX (PIC iX) Versions C.02 and C.03 receives input or
data, but does not validate or incorrectly validates that the input has the
properties required to process the data safely and correctly.
CVE-2021-43548 has been assigned to this vulnerability. A CVSS v3 base score of
6.5 has been calculated; the CVSS vector string is ( AV:A/AC:L/PR:N/UI:N/S:U/
C:N/I:N/A:H ).
3.2.2 USE OF HARD-CODED CRYPTOGRAPHIC KEY CWE-321
The use of a hard-coded cryptographic key significantly increases the
possibility encrypted data may be recovered from the Patient Information Center
iX (PIC iX) Versions B.02, C.02, and C.03.
CVE-2021-43552 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:N/S:U/
C:H/I:L/A:N ).
3.2.3 USE OF A BROKEN OR RISKY CRYPTOGRAPHIC ALGORITHM CWE-327
The use of a broken or risky cryptographic algorithm is an unnecessary risk
that may result in the exposure of sensitive information, which affects the
communications between Patient Information Center iX (PIC iX) Versions C.02 and
C.03 and Efficia CM Series Revisions A.01 to C.0x and 4.0.
CVE-2021-43550 has been assigned to this vulnerability. A CVSS v3 base score of
5.9 has been calculated; the CVSS vector string is ( AV:A/AC:H/PR:N/UI:N/S:U/
C:H/I:L/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
Younes Dragoni, Andrea Palanca and Ivan Speziale of Nozomi Networks reported
these vulnerabilities to CISA.
4. MITIGATIONS
Philips released a remediation for CVE-2021-43548 in Q3 2021 in PIC iX C.03.06.
For the remaining vulnerabilities, CVE-2021-43552 and CVE-2021-43550 , Philips
plans remediation by end of Q4 of 2022.
Users should operate all Philips deployed and supported products within Philips
authorized specifications, including Philips approved software, software
configuration, system services, and security configuration.
As an interim mitigation, Philips recommends the following actions outlined in
the Philips Patient Monitoring System Security for Clinical Networks guide at
InCenter :
o Philips provided hardware ships with Bitlocker Drive Encryption enabled by
default to protect the data at rest stored on the system. It should not be
disabled.
o Philips recommends customers follow NIST SP 800-88 for media sanitization
prior to system disposal.
o By default, patient information is not included in archives. When exporting
archives that contain patient information, users should store information
securely with strong access controls.
o The Philips patient monitoring network is required to be physically or
logically isolated from the hospital local area network (LAN). Philips
recommends using a firewall or routers that can implement access control
lists restricting access in and out of the patient monitoring network for
only necessary ports and IP addresses.
Users with questions regarding their specific Philips Patient Information
Center (PIC iX) and Efficia CM Series new release eligibility should contact a
Philips service support team or regional service support. Philips contact
information is available at the Philips customer service website , or by
calling 1-800-722-9377.
Please see 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 this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
o When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing VPNs may have vulnerabilities and should be
updated to the most current version available. Also recognize VPN is only
as secure as its connected devices.
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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