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AUSCERT External Security Bulletin Redistribution
ESB-2022.6119
Advisory (icsma-21-152-01) Hillrom Medical Device Management (Update C)
23 November 2022
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AusCERT Security Bulletin Summary
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Product: Hillrom Medical Device Management
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2021-27410 CVE-2021-27408
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsma-21-152-01
Comment: CVSS (Max): 5.9 CVE-2021-27410 (CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L
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ICS Medical Advisory (ICSMA-21-152-01)
Hillrom Medical Device Management (Update C)
Original release date: November 22, 2022
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 5.9
o ATTENTION: Exploitable remotely
o Vendor: Hillrom
o Equipment: Welch Allyn medical device management tools
o Vulnerabilities: Out-of-Bounds Write, Out-of-Bounds Read
2. UPDATE INFORMATION
This updated advisory is a follow-up to the original advisory titled
ICSA-21-152-01 Hillrom Medical Device Management (Update B) that was published
September 8, 2022, to the ICS webpage at www.cisa.gov/ics.
3. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
cause memory corruption and remotely execute arbitrary code.
4. TECHNICAL DETAILS
4.1 AFFECTED PRODUCTS
The following Hillrom products, are affected:
o Welch Allyn Service Tool: versions prior to v1.10
o Welch Allyn Connex Device Integration Suite - Network Connectivity Engine
(NCE): versions prior to v5.3
o Welch Allyn Software Development Kit (SDK): versions prior to v3.2
o Welch Allyn Connex Central Station (CS): versions prior to v1.8.4 Service
Pack 01
o Welch Allyn Service Monitor: versions prior to v1.7.0.0
o Welch Allyn Connex Vital Signs Monitor (CVSM): versions prior to v2.43.02
o Welch Allyn Connex Integrated Wall System (CIWS): versions prior to
v2.43.02
o Welch Allyn Connex Spot Monitor (CSM): versions prior to v1.52
o Welch Allyn Spot Vital Signs 4400 Device (Spot 4400) / Welch Allyn Spot
4400 Vital Signs Extended Care Device: versions prior to v1.11.00
4.2 VULNERABILITY OVERVIEW
4.2.1 OUT-OF-BOUNDS WRITE CWE-787
The affected product is vulnerable to an out-of-bounds write, which may result
in corruption of data or code execution.
CVE-2021-27410 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:L/UI:N/S:U/
C:L/I:H/A:L ).
4.2.2 OUT-OF-BOUNDS READ CWE-125
The affected product is vulnerable to an out-of-bounds read, which can cause
information leakage leading to arbitrary code execution if chained to the
out-of-bounds write vulnerability.
CVE-2021-27408 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:L/UI:N/S:U/
C:L/I:H/A:L ).
4 .3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Healthcare and Public Health
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: United States
4.4 RESEARCHER
Itamar Cohen-Matalon of Medigate Research Labs reported these vulnerabilities
to Hillrom.
4. MITIGATIONS
Hillrom has released software updates for all impacted devices to address these
vulnerabilities. New versions of the products that mitigate the vulnerabilities
are available as follows:
o Welch Allyn Service Tool: v1.10
o Welch Allyn Software Development Kit (SDK): v3.2
- --------- Begin Update C Part 1 of 1 ---------
o Welch Allyn Connex Central Station (CS): v1.8.4 Service Pack 01 (released
November 2022)
- --------- End Update C Part 1 of 1 ---------
o Welch Allyn Connex Device Integration Suite - Network Connectivity Engine
(NCE): v5.3 (released September 2021)
o Welch Allyn Spot Vital Signs 4400 Device (Spot 4400) / Welch Allyn Spot
4400 Vital Signs Extended Care Device: v1.11.00 (Released October 2021)
o Welch Allyn Service Monitor: v1.7.0.0
o Welch Allyn Connex Vital Signs Monitor (CVSM): v2.43.02
o Welch Allen Connex Integrated Wall System (CIWS): v2.43.02
o Welch Allyn Connex Spot Monitor (CSM): v1.52
o Welch Allyn Spot Vital Signs 4400 Device (Spot 4400) / Welch Allyn Spot
4400 Vital Signs Extended Care Device: v1.11.00 (available Fall 2021)
Hillrom recommends users to upgrade to the latest versions of their products.
Information on how to update these products to their new versions can be found
on the Hillrom disclosure page .
Hillrom recommends the following workarounds to help reduce risk:
o Apply proper network and physical security controls.
o Apply authentication for server access.
o Apply data execution prevention (DEP) where applicable to help prevent
shellcode from running. Address space layout randomization (ASLR) is built
into standard Windows and Linux distributions.
CISA recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. Specifically, users should:
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 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 cisa.gov in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
No known public exploits specifically target these vulnerabilities. These
vulnerabilities have high attack complexity.
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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