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AUSCERT External Security Bulletin Redistribution
ESB-2019.4311
Advisory (icsma-19-318-01) Philips IntelliBridge EC40/80
15 November 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Phillips IntelliBridge EC40
Phillips IntelliBridge EC80
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Resolution: Mitigation
CVE Names: CVE-2019-18241
Original Bulletin:
https://www.us-cert.gov/ics/advisories/icsma-19-318-01
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ICS Medical Advisory (ICSMA-19-318-01)
Philips IntelliBridge EC40/80
Original release date: November 14, 2019
Legal Notice
All information products included in http://ics-cert.us-cert.gov 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 http://www.us-cert.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 6.3
o ATTENTION: Low skill level to exploit
o Vendor: Philips
o Equipment: IntelliBridge EC40 and EC80
o Vulnerability: Inadequate Encryption Strength
2. RISK EVALUATION
Successful exploitation of this vulnerability may allow an attacker
unauthorized access to the IntelliBridge EC40/80 hub and may allow access to
execute software, modify system configuration, or view/update files, including
unidentifiable patient data.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of IntelliBridge are affected:
o IntelliBridge EC40 Hub, all versions
o IntelliBridge EC80 Hub, all versions
The IntelliBridge EC40/80 is intended to transfer medical device data from one
format to another according to preset specifications. It performs data transfer
without controlling or altering the function or parameters of any connected
medical devices. The EC40/80 is not intended for use in connection with active
patient monitoring. If data is not received from the hub a notification is
generated on the PIC iX Central Station and customers are advised to refer to
the source medical device.
3.2 VULNERABILITY OVERVIEW
3.2.1 INADEQUATE ENCRYPTION STRENGTH CWE-326
The SSH server running on the affected products is configured to allow weak
ciphers. This could enable an unauthorized attacker with access to the network
to capture and replay the session and gain unauthorized access to the EC40/80
hub.
CVE-2019-18241 has been assigned to this vulnerability. A CVSS v3 base score of
6.3 has been calculated; the CVSS vector string is ( AV:A/AC:L/PR:N/UI:N/S:U/
C:L/I:L/A:L ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Healthcare and Public Health
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Netherlands
3.4 RESEARCHER
The Medical Technology Solutions team of NewYork-Presbyterian Hospital reported
this vulnerability to Philips.
4. MITIGATIONS
Philips plans a new release to remediate this vulnerability by the end of Q3
2020.
As an interim mitigation to this vulnerability, Philips recommends the
following:
o Users should operate all Philips deployed and supported products within
Philips authorized specifications, including Philips approved software,
software configuration, system services, and security configuration.
o The medical device network should be logically or physically isolated from
the hospital network as specified in the Philips Patient Monitoring System
Security for Clinical Networks guide, available on Philips InCenter . There
is no clinical requirement for these devices to communicate outside of the
Philips clinical network.
o SSH is not meant to be used for clinical purposes and should be used only
for supporting the product. Users can block network access to/from the SSH
port without affecting device functionality.
o The SSH password can be configured by the user to be long and complex.
Password distribution can be controlled to ensure SSH is used via physical
access only.
Users with questions about their specific EC40/80 product should contact a
Philips service support team or regional service support.
The Philips advisory is available at the following URL: http://www.philips.com/
productsecurity
Please see the Philips product security website for the latest security
information for Philips products:
https://www.philips.com/productsecurity
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
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 that can be found at the
following location:
https://www.fda.gov/MedicalDevices/DigitalHealth/ucm373213.htm
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 this vulnerability. This
vulnerability is exploitable from an adjacent network.
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