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AUSCERT External Security Bulletin Redistribution
ESB-2020.0645
Advisory (icsa-20-051-01) B&R Industrial Automation
Automation Studio and Automation Runtime
25 February 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: B&R Industrial Automation Automation Studio and Automation Runtime
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
Resolution: Mitigation
CVE Names: CVE-2019-19108
Original Bulletin:
https://www.us-cert.gov/ics/advisories/icsa-20-051-01
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ICS Advisory (ICSA-20-051-01)
B&R Industrial Automation Automation Studio and Automation Runtime
Original release date: February 20, 2020
Legal Notice
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
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://www.us-cert.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 9.4
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: B&R Industrial Automation GmbH
o Equipment: Automation Studio and Automation Runtime
o Vulnerability: Improper Authorization
2. RISK EVALUATION
Successful exploitation of this vulnerability may allow a remote attacker to
modify the configuration of affected devices.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of B&R products are affected:
o Automation Studio Versions 2.7, 3.0.71, 3.0.80, 3.0.81, 3.0.90, 4.0.x to
4.6.4, and 4.7.2
o Automation Runtime Versions 2.96, 3.00, 3.01, 3.06, 3.07, 3.08 to 3.10,
4.00 to 4.03, 4.04 to 4.03, 4.04 to 4.63, 4.72 and above.
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER AUTHORIZATIONCWE-285
The affected products are vulnerable to a weakness in SNMP service, which
allows unauthenticated users to modify the configuration via the service.
CVE-2019-19108 has been assigned to this vulnerability. A CVSS v3 base score of
9.4 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:L/I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Chemical, Critical Manufacturing, Energy
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Austria
3.4 RESEARCHER
Yehuda Anikster and Amir Preminger of Claroty reported this vulnerability to
CISA.
4. MITIGATIONS
B&R reports product-technical reasons disallow the changing of SNMP
credentials. To reduce risk from this vulnerability, the following Automation
Studio versions disable the SNMP service by default in newly created AS
projects:
o AS 4.6.5 (Planned release date: 2020-03-27) and higher
o AS 4.7.3 (Planned release date: 2020-04-10) and higher
o AS 4.8.2 (Planned release date: 2020-06-11) and higher
B&R reports the above-mentioned dates denoted as planned are preliminary and
may be subject to change. Registered users may approach their local B&R service
organization in case of questions.
B&R recommends that affected users evaluate their need for the SNMP service and
disable it if possible.
For more information related to this vulnerability please refer to the B&R
advisory .
For additional information and support, please contact B&R service .
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet .
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 that VPNs may have vulnerabilities and should
be updated to the most current version available. Also recognize that VPN
is only as secure as the 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 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.
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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