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AUSCERT External Security Bulletin Redistribution
ESB-2022.2545
Advisory (icsa-22-144-01) Rockwell Automation Logix Controllers
25 May 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Rockwell Automation Logix Controllers
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2022-1797
Original Bulletin:
https://www.cisa.gov/uscert/ics/advisories/icsa-22-144-01
Comment: CVSS (Max): 6.8 CVE-2022-1797 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
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ICS Advisory (ICSA-22-144-01)
Rockwell Automation Logix Controllers
Original release date: May 24, 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 6.8
o ATTENTION: Exploitable remotely
o Vendor: Rockwell Automation
o Equipment: Logix Controllers
o Vulnerability: Uncontrolled Resource Consumption
2. RISK EVALUATION
Successful exploitation of this vulnerability may allow an unauthorized user to
send malicious messages to the targeted device, which could lead to a
denial-of-service condition.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Rockwell Automation reports this vulnerability affects the following Logix
Controllers:
o CompactLogix 5380 controllers: firmware Versions 32.013 and earlier
o Compact GuardLogix 5380 controllers: firmware Versions 32.013 and earlier
o CompactLogix 5480 controllers: firmware Versions 32.013 and earlier
o ControlLogix 5580 controllers: firmware Versions 32.013 and earlier
o GuardLogix 5580 controllers: firmware Versions 32.013 and earlier
o CompactLogix 5370 controllers: firmware Versions 33.013 and earlier
o Compact GuardLogix 5370 controllers: firmware Versions 33.013 and earlier
o ControlLogix 5570 controllers: firmware Versions 33.013 and earlier
o GuardLogix 5570 controllers: firmware Versions 33.013 and earlier
3.2 VULNERABILITY OVERVIEW
3.2.1 UNCONTROLLED RESOURCE CONSUMPTION CWE-400
A malformed Class 3 common industrial protocol message with a cached connection
can cause a denial-of-service condition, resulting in a major nonrecoverable
fault. If the target device becomes unavailable, a user would have to clear the
fault and redownload the user project file to bring the device back online.
CVE-2022-1797 has been assigned to this vulnerability. A CVSS v3 base score of
6.8 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:N/S:C/
C:N/I:N/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Multiple Sectors
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: United States
3.4 RESEARCHER
Rockwell Automation discovered this vulnerability during routine security
testing and reported it to CISA.
4. MITIGATIONS
Rockwell Automation recommends users update to the latest firmware version to
mitigate this vulnerability. Users are directed towards the risk mitigation
provided below and are encouraged (where possible) to combine these with the
general security guidelines below to employ multiple strategies simultaneously.
Users should go to Rockwell Automation's Product Compatibility & Download
Center to download the latest firmware.
o CompactLogix 5380, Compact GuardLogix 5380, CompactLogix 5480, ControlLogix
5580, GuardLogix 5580: Upgrade to v33.011 firmware
o CompactLogix 5370, Compact GuardLogix 5370, ControlLogix 5570, GuardLogix
5570: Upgrade to v34.011 firmware
If upgrading is not possible, Rockwell Automation recommends the following
mitigations:
o Use of Microsoft AppLocker or other similar allow list applications can
help mitigate risk. Information on using AppLocker with products from
Rockwell Automation is available in Knowledgebase article QA17329 .
o Confirm the least-privilege user principle is followed, and user/service
account access to shared resources (such as a database) is only granted
with a minimum number of rights as needed.
Rockwell Automation general security guidelines:
o Use trusted software, software patches, antivirus/antimalware programs and
interact only with trusted websites and attachments.
o Minimize network exposure for all control system devices and/or systems and
confirm they are not accessible from the Internet. For further information
about the risks of unprotected Internet accessible control systems, see
Knowledgebase article PN715 .
o Locate control system networks and 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 a VPN is only
as secure as connected devices.
o Please see Rockwell Automation's security advisory PN1596 for more
information.
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. 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 .
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. This
vulnerability has a 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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