5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.001 Low
EPSS
Percentile
41.6%
**ATTENTION:**Remotely exploitable/low skill level to exploit.
Vendor: Moxa
Equipment: NPort 5110, 5130, 5150
Vulnerabilities: Injection, Information Exposure, Resource Exhaustion
The following versions of NPort, a serial network interface, are affected:
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 from:
NPort 5110 https://www.moxa.com/support/download.aspx?type=support&id=882
NPort 5130 and NPort 5150 https://www.moxa.com/support/download.aspx?type=support&id=356
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
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 ICSβCERT Technical Information Paper, ICS-TIP-12-146-01BβTargeted 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.
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).
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).
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).
Florian Adamsky reported the vulnerabilities to ICS-CERT and tested the new firmware.
Critical Infrastructure Sectors: Critical Manufacturing, Energy, and Transportation Systems
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Taiwan
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-14028
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-16715
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-16719
cwe.mitre.org/data/definitions/200.html
cwe.mitre.org/data/definitions/400.html
cwe.mitre.org/data/definitions/74.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Moxa%20NPort%205110%2C%205130%2C%20and%205150+https://www.cisa.gov/news-events/ics-advisories/icsa-17-320-01
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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www.moxa.com/support/download.aspx?type=support&id=356
www.moxa.com/support/download.aspx?type=support&id=882
www.oig.dhs.gov/
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-17-320-01
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mailto:?subject=Moxa%20NPort%205110%2C%205130%2C%20and%205150&body=www.cisa.gov/news-events/ics-advisories/icsa-17-320-01
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.001 Low
EPSS
Percentile
41.6%