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AUSCERT External Security Bulletin Redistribution
ESB-2020.2366
Advisory (icsa-20-191-02) Rockwell Automation Logix Designer Studio 5000
13 July 2020
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AusCERT Security Bulletin Summary
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Product: Rockwell Automation Logix Designer Studio 5000
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-12025
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-20-191-02
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ICS Advisory (ICSA-20-191-02)
Rockwell Automation Logix Designer Studio 5000
Original release date: July 09, 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 3.6
o ATTENTION: Low skill level to exploit
o Vendor: Rockwell Automation
o Equipment: Logix Designer Studio 5000
o Vulnerability: Improper Restriction of XML External Entity Reference
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an unauthenticated
attacker to craft a malicious file, which when parsed, could lead to some
information disclosure of hostnames or other resources from the program.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Logix Designer Studio 500 are affected:
Logix Designer Studio 5000 Versions 32.00, 32.01, and 32.02
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER RESTRICTION OF XML EXTERNAL ENTITY REFERENCE CWE-611
The affected product is vulnerable to an xml external entity (XXE)
vulnerability, which may allow an attacker to view hostnames or other resources
from the program.
CVE-2020-12025 has been assigned to this vulnerability. A CVSS v3 base score of
3.6 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:C/C:L/
I:N/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy, Water and
Wastewater Systems
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: United States
3.4 RESEARCHER
The Incite Team, as well as researchers at Claroty, reported this vulnerability
to Rockwell Automation.
4. MITIGATIONS
Rockwell Automation recommends that affected users of the AML or RDF files
should not accept files from unknown sources and remain cautious of social
engineering attempts that may take advantage of this vulnerability.
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.
CISA also recommends users take the following measures to protect themselves
from social engineering attacks:
o Do not click web links or open unsolicited attachments in email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
No known public exploits specifically target this vulnerability. This
vulnerability is not exploitable remotely.
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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