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AUSCERT External Security Bulletin Redistribution
Advisory (ICSA-19-134-01) Omron Network Configurator for DeviceNet
15 May 2019
AusCERT Security Bulletin Summary
Product: Omron Network Configurator for DeviceNet
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
CVE Names: CVE-2019-10971
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Omron Network Configurator for DeviceNet
Original release date: May 14, 2019
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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. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to
achieve arbitrary code execution under the privileges of the application.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Network Configurator for DeviceNet Safety are
o Network Configurator for DeviceNet Safety 3.41 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 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/
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Japan
The researcher with the handle n0b0dy sent information to NCCIC, leading to the
discovery of this vulnerability.
Omron is planning on releasing an update that mitigates the issues in the near
Omron has recommended applying the following workarounds for 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
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.
NCCIC 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.
NCCIC reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended
practices on the ICS-CERT web page. 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-CERT website 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 NCCIC 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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