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AUSCERT External Security Bulletin Redistribution
Advisory (icsa-19-274-03) Moxa EDR 810 Series
2 October 2019
AusCERT Security Bulletin Summary
Product: Moxa EDR 810 Series
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
CVE Names: CVE-2019-10969 CVE-2019-10963
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ICS Advisory (ICSA-19-274-03)
Moxa EDR 810 Series
Original release date: October 01, 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 7.2
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: Moxa
o Equipment: EDR 810
o Vulnerabilities: Improper Input Validation, Improper Access Control
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow remote code
execution or access to sensitive information.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of the Moxa EDR 810 router are affected:
EDR-810: All versions 5.1 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER INPUT VALIDATION CWE-20
An authenticated attacker may abuse the ping feature to execute unauthorized
commands on the router, which could allow an attacker to perform remote code
CVE-2019-10969 has been assigned to this vulnerability. A CVSS v3 base score of
7.2 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:H/UI:N/S:U/
3.2.2 IMPROPER ACCESS CONTROL CWE-284
An unauthenticated attacker may be able to retrieve some log files from the
device, which may allow sensitive information disclosure. Log files must have
previously been exported by a legitimate user.
CVE-2019-10963 has been assigned to this vulnerability. A CVSS v3 base score of
4.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:U/
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy, Water and
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Taiwan
Moxa recommends users upgrade to the latest firmware, v5.2 or later.
For more information, please see Moxa's security advisory .
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
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.
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