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AUSCERT External Security Bulletin Redistribution
ESB-2019.2526
Advisory (icsma-19-190-01) GE Aestiva and Aespire Anesthesia
10 July 2019
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AusCERT Security Bulletin Summary
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Product: GE Aestiva and Aespire Anesthesia
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-10966
Original Bulletin:
https://www.us-cert.gov/ics/advisories/icsma-19-190-01
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ICS Medical Advisory (ICSMA-19-190-01)
GE Aestiva and Aespire Anesthesia
Original release date: July 09, 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 5.3
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: GE
o Equipment: Aestiva and Aespire Anesthesia
o Vulnerability: Improper Authentication
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker the
ability to remotely modify GE Healthcare anesthesia device parameters. This
results from the configuration exposure of certain terminal server
implementations that extend GE Healthcare anesthesia device serial ports to TCP
/IP networks.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of GE Aestiva and Aespire Anesthesia Machines, are
affected:
o GE Aestiva and Aespire Versions 7100
o GE Aestiva and Aespire Versions 7900
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER AUTHENTICATION CWE-287
A vulnerability exists where serial devices are connected via an added
unsecured terminal server to a TCP/IP network configuration, which could allow
an attacker to remotely modify device configuration and silence alarms.
CVE-2019-10966 has been assigned to this vulnerability. A CVSS v3 base score of
5.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:N/I:L/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Healthcare and Public Health
o COUNTRIES/AREAS DEPLOYED: United States
o COMPANY HEADQUARTERS LOCATION: United States
3.4 RESEARCHER
Elad Luz of CyberMDX reported this vulnerability to NCCIC.
4. MITIGATIONS
GE Healthcare recommends organizations use secure terminal servers when
connecting GE Healthcare anesthesia device serial ports to TCP/IP networks.
Secure terminal servers provide robust security features, including strong
encryption, VPN, authentication of users, network controls, logging, audit
capability, and secure device configuration and management options.
GE Healthcare recommends that organizations utilize best practices for terminal
servers that include governance, management, and secure deployment measures
such as network segmentation, VLANs, and device isolation to enhance existing
security measures.
GE Healthcare plans to provide updates and additional security information
about this vulnerability for affected users at the following location:
http://www3.gehealthcare.com/en/support/security
NCCIC recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all medical devices and/or systems.
o Locate medical devices behind firewalls and isolate them where possible.
o Restrict system access to authorized personnel only and follow a least
privilege approach.
o Apply defense-in-depth strategies.
o Disable any unnecessary accounts, protocols and services.
o Where additional information is needed, refer to existing cybersecurity in
medical device guidance issued by the FDA at the following location:
https://www.fda.gov/MedicalDevices/DigitalHealth/ucm373213.htm
NCCIC reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended
practices on the ICS-CERT web page. 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-CERT website 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 NCCIC for tracking
and correlation against other incidents.
No known public exploits specifically target this vulnerability.
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