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AUSCERT External Security Bulletin Redistribution
ESB-2017.2955
Multiple vulnerabilities have been identified in Moxa NPort
5110, 5130, and 5150
17 November 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: Moxa NPort
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-16719 CVE-2017-16715 CVE-2017-14028
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-17-320-01
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Advisory (ICSA-17-320-01)
Moxa NPort 5110, 5130, and 5150
Original release date: November 16, 2017
Legal Notice
All information products included in http://ics-cert.us-cert.gov 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 http://www.us-cert.gov/tlp/.
CVSS v3 8.6
ATTENTION: Remotely exploitable/low skill level to exploit.
Vendor: Moxa
Equipment: NPort 5110, 5130, 5150
Vulnerabilities: Injection, Information Exposure, Resource Exhaustion
AFFECTED PRODUCTS
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.
IMPACT
Successful exploitation of these vulnerabilities could allow for remote code
execution on the device.
MITIGATION
Moxa has produced new firmware for the affected devices that can be downloaded
from:
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
external)
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.
VULNERABILITY OVERVIEW
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
(AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
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
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L).
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
(AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
RESEARCHER
Florian Adamsky reported the vulnerabilities to ICS-CERT and tested the new
firmware.
BACKGROUND
Critical Infrastructure Sectors: Critical Manufacturing, Energy, and
Transportation Systems
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Taiwan
Contact Information
For any questions related to this report, please contact ICS-CERT at:
Email: ics-cert@hq.dhs.gov (link sends e-mail)
Toll Free: 1-877-776-7585
International Callers: (208) 526-0900
For industrial control systems security information and incident reporting:
http://ics-cert.us-cert.gov
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
product.
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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
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