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AUSCERT External Security Bulletin Redistribution
ICS Medical Advisory (ICSMA-21-047-01)
17 February 2021
AusCERT Security Bulletin Summary
Operating System: Network Appliance
Impact/Access: Administrator Compromise -- Existing Account
Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
CVE Names: CVE-2020-27290 CVE-2020-27282 CVE-2020-27278
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ICS Medical Advisory (ICSMA-21-047-01)
Original release date: February 16, 2021
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1. EXECUTIVE SUMMARY
o CVSS v3 4.3
o ATTENTION: Low skill level to exploit
o Vendor: Hamilton Medical AG
o Equipment: Hamilton-T1
o Vulnerabilities: Use of Hard-coded Credentials, Missing XML Validation
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow attackers with
physical access to the device to obtain sensitive information or crash the
device being accessed.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of the Hamilton-T1 Ventilator, are affected:
o T1 Ventilator Versions 2.2.3 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 USE OF HARD-CODED CREDENTIALS CWE-798
Hard-Coded credentials in the ventilator allow attackers with physical access
to obtain admin privileges for the device's configuration interface.
CVE-2020-27278 has been assigned to this vulnerability. A CVSS v3 base score of
3.5 has been calculated; the CVSS vector string is ( AV:P/AC:L/PR:N/UI:N/S:U/
3.2.2 MISSING XML VALIDATION CWE-112
An XML validation vulnerability in the ventilator allows privileged attackers
with physical access to render the device persistently unusable by uploading
specially crafted configuration files.
CVE-2020-27282 has been assigned to this vulnerability. A CVSS v3 base score of
4.3 has been calculated; the CVSS vector string is ( AV:P/AC:L/PR:L/UI:N/S:U/
3.2.3 EXPOSURE OF SENSITIVE INFORMATION TO AN UNAUTHORIZED ACTOR CWE-200
An information disclosure vulnerability in the ventilator allows attackers with
physical access to the configuration interface's logs to get valid checksums
for tampered configuration files.
CVE-2020-27290 has been assigned to this vulnerability. A CVSS v3 base score of
2.1 has been calculated; the CVSS vector string is ( AV:P/AC:L/PR:L/UI:N/S:U/
o CRITICAL INFRASTRUCTURE SECTORS: Healthcare and Public Health
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Switzerland
Julian Suleder, Raphael Pavlidis, and Nils Emmerich of ERNW Research GmbH and
Dr. Oliver Matula of ERNW Enno Rey Netzwerke GmbH reported these
vulnerabilities to the Federal Office for Information Security (BSI, Germany),
in the context of the BSI project ManiMed - Manipulation of Medical Devices.
BSI then provided this report to CISA.
Hamilton Medical recommends users of affected versions update to a version
later than T1 Ventilator Version 2.2.3 where possible. Additionally, Hamilton
Medical recommends users:
o Maintain tight physical control of the ventilator.
o Be attentive to notifications, alarms, and alerts.
o Do not connect to any third-party devices or use any unauthorized software.
CISA recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities
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
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:
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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