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AUSCERT External Security Bulletin Redistribution
Multiple vulnerabilities have been identified in Moxa NPort
5110, 5130, and 5150
17 November 2017
AusCERT Security Bulletin Summary
Product: Moxa NPort
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
CVE Names: CVE-2017-16719 CVE-2017-16715 CVE-2017-14028
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Moxa NPort 5110, 5130, and 5150
Original release date: November 16, 2017
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referenced in this product or otherwise. Further dissemination of this product
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more information about TLP, see http://www.us-cert.gov/tlp/.
CVSS v3 8.6
ATTENTION: Remotely exploitable/low skill level to exploit.
Equipment: NPort 5110, 5130, 5150
Vulnerabilities: Injection, Information Exposure, Resource Exhaustion
The following versions of NPort, a serial network interface, are affected:
NPort 5110 Version 2.2,
NPort 5110 Version 2.4,
NPort 5110 Version 2.6,
NPort 5110 Version 2.7,
NPort 5130 Version 3.7 and prior, and
NPort 5150 Version 3.7 and prior.
Successful exploitation of these vulnerabilities could allow for remote code
execution on the device.
Moxa has produced new firmware for the affected devices that can be downloaded
NPort 5110 https://www.moxa.com/support/download.aspx?type=support&id=882
(link is external)
NPort 5130 and NPort 5150
https://www.moxa.com/support/download.aspx?type=support&id=356 (link is
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the
risk of exploitation of these vulnerabilities. Specifically, users should:
Minimize network exposure for all control system devices and/or systems, and
ensure that they are not accessible from the Internet.
Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
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.
ICS-CERT reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
ICS-CERT 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 in the ICS-CERT Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies, that is available for download from the ICS-CERT web site.
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to ICS-CERT for
tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS IN OUTPUT USED BY A DOWNSTREAM
COMPONENT ('INJECTION') CWE-74
An attacker may be able to inject packets that could potentially disrupt the
availability of the device.
CVE-2017-16719 has been assigned to this vulnerability. A CVSS v3 base score
of 7.5 has been assigned; the CVSS vector string is
INFORMATION EXPOSURE CWE-200
An attacker may be able to exploit a flaw in the handling of Ethernet frame
padding that may allow for information exposure.
CVE-2017-16715 has been assigned to this vulnerability. A CVSS v3 base score
of 8.6 has been assigned; the CVSS vector string is
UNCONTROLLED RESOURCE CONSUMPTION ('RESOURCE EXHAUSTION') CWE-400
An attacker may be able to exhaust memory resources by sending a large amount
of TCP SYN packets.
CVE-2017-14028 has been assigned to this vulnerability. A CVSS v3 base score
of 7.5 has been assigned; the CVSS vector string is
Florian Adamsky reported the vulnerabilities to ICS-CERT and tested the new
Critical Infrastructure Sectors: Critical Manufacturing, Energy, and
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Taiwan
For any questions related to this report, please contact ICS-CERT at:
Email: email@example.com (link sends e-mail)
Toll Free: 1-877-776-7585
International Callers: (208) 526-0900
For industrial control systems security information and incident reporting:
ICS-CERT continuously strives to improve its products and services. You can
help by choosing one of the links below to provide feedback about this
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