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AUSCERT External Security Bulletin Redistribution
Advisory (icsma-20-170-06) BD Alaris PCU
22 June 2020
AusCERT Security Bulletin Summary
Product: BD Alaris PCU
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2019-11479
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ICS Medical Advisory (ICSMA-20-170-06)
BD Alaris PCU
Original release date: June 18, 2020
All information products included in https://us-cert.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
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about TLP, see https://www.us-cert.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 5.3
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: Becton, Dickinson and Company (BD)
o Equipment: Alaris PCU
o Vulnerability: Uncontrolled Resource Consumption
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to cause
a denial of service (DoS) on the target system and could cause the BD Alaris
PCU to disconnect from the facility's wireless network.
Wireless functionality operates independently from the pump system and a
disruption in wireless connectivity would not affect pump module functionality.
Exploiting this vulnerability would not provide administrative access to the BD
Alaris PC Unit or the BD Alaris Systems Manager. An unauthorized user would not
be able to gain permissions or be able to perform remote commands for the BD
Alaris PC Unit.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of the BD Alaris PCU that has implemented the Linux
Kernel v4.4.97 within the Laird Wireless Module WB40N are affected:
o Alaris PC Unit: Versions 9.13, 9.19, 9.33, and 12.1
3.2 VULNERABILITY OVERVIEW
3.2.1 UNCONTROLLED RESOURCE CONSUMPTION CWE-400
The affected products incorporate a vulnerable Linux kernel which is vulnerable
to uncontrolled resource consumption due to a hard-coded Linux kernel maximum
segment size overflow. This could allow an attacker to cause a denial of
service, affecting the wireless functionality of the vulnerable devices.
CVE-2019-11479 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/
o CRITICAL INFRASTRUCTURE SECTORS: Healthcare and Public Health
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: United States
BD notified CISA that these products are affected by this Linux kernel
BD recommends the following to help reduce the risks associated with this
o Consider stronger network controls for wireless authentication, which are
harder to replicate and substitute, such as enterprise versions of WPA2
o Users with Intrusion Detection Systems (IDS) should consider monitoring
wireless networks with patient connected devices for possible malicious
o BD Alaris Systems Manger should be considered a critical service. Whenever
possible, it should be operated on a secure network behind a firewall, it
should be patched regularly, and should have malware protection.
o Ensure that the BD Alaris PC Unit and BD Alaris Systems Manager are
separated by a firewall.
For more information on BD's product security and vulnerability management,
contact the BD product security office .
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Where additional information is needed,
users should refer to existing cybersecurity in medical device guidance issued
by the FDA .
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
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.
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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