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AUSCERT External Security Bulletin Redistribution
ESB-2019.1717.2
Advisory (ICSA-19-134-01) Omron Network Configurator for DeviceNet
6 November 2019
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AusCERT Security Bulletin Summary
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Product: Omron Network Configurator for DeviceNet
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-10971
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-19-134-01
Revision History: November 6 2019: Update provided to mitigate vulnerability
May 15 2019: Initial Release
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ICS Advisory (ICSA-19-134-01)
Omron Network Configurator for DeviceNet (Update A)
Original release date: November 05, 2019
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provided "as is" for informational purposes only. The Department of Homeland
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1. EXECUTIVE SUMMARY
o CVSS v3 7.3
o ATTENTION: Low skill level to exploit
o Vendor: Omron
o Equipment: Network Configurator for DeviceNet
o Vulnerability: Untrusted Search Path
2. UPDATE INFORMATION
This updated advisory is a follow-up to the original advisory titled
ICSA-19-134-01 Omron Network Configurator for DeviceNet that was published May
14, 2019, on the ICS webpage on us-cert.gov.
3. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to
achieve arbitrary code execution under the privileges of the application.
4. TECHNICAL DETAILS
4.1 AFFECTED PRODUCTS
The following versions of Network Configurator for DeviceNet Safety are
affected:
o Network Configurator for DeviceNet Safety 3.41 and prior
4.2 VULNERABILITY OVERVIEW
4.2.1 UNTRUSTED SEARCH PATH CWE-426
The application searches for resources by means of an untrusted search path
that could execute a malicious .dll file not under the application's direct
control and outside the intended directories.
CVE-2019-10971 has been assigned to this vulnerability. A CVSS v3 base score of
7.3 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:R/S:U/C:H
/I:H/A:H).
4.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Japan
4.4 RESEARCHER
The researcher with the handle n0b0dy sent information to CISA, leading to the
discovery of this vulnerability.
5. MITIGATIONS
- --------- Begin Update A Part 1 of 1 ---------
Omron has released Version 3.42 of Network Configurator for DeviceNet Safety to
address the reported vulnerability. Users can download the latest version of
Network Configurator for DeviceNet Safety.
Omron has recommended applying the following for further mitigation:
o Remove or restrict directories listed in the PATH environment variable.
o Ensure system directories are writable only by administrators, which is
Windows' initial configuration.
o Operate Windows PCs with a standard user (non-administrator) account.
Administrator accounts should be used only when necessary.
o Ensure there are no untrusted files in the directory where the application
is installed.
o Confirm no untrusted files exist in the same directory before
double-clicking project file or copying the project file to a trusted
directory or a newly-created temporary directory.
- --------- End Update A Part 1 of 1 ---------
CISA also recommends that 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.
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. This
vulnerability is not exploitable remotely.
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