CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
67.9%
This updated advisory is a follow-up to the original advisory titled ICSA-16-145-01 Moxa MiiNePort Vulnerabilities that was published May 24, 2016, on the NCCIC/ICS-CERT web site.
Independent researcher Karn Ganeshen has identified weak credential management, sensitive information not protected, and cross-site request forgery vulnerabilities in Moxaβs MiiNePort serial device server module series. Moxa will produce a beta patch firmware in late May 2016 to mitigate these vulnerabilities.
These vulnerabilities could be exploited remotely.
The following MiiNePort versions are affected:
Successful exploitation of these vulnerabilities allow silent execution of unauthorized actions on the device such as password change, configuration parameter changes, saving modified configuration, and device reboot.
Impact to individual organizations depends on many factors that are unique to each organization. ICS-CERT recommends that organizations evaluate the impact of these vulnerabilities based on their operational environment, architecture, and product implementation.
Moxa is a Taiwan-based company that maintains offices in several countries around the world, including the US, the UK, India, Germany, France, China, Russia, and Brazil.
The affected product, MiiNePort, is a serial device server module. According to Moxa, MiiNePort is deployed across several sectors including Commercial Facilities, Critical Manufacturing, Energy, and Transportation Systems. Moxa estimates that this product is used primarily in the United States and Europe with a small percentage in Asia.
Information strings are shown in clear text when viewing device config file.
CVE-2016-2295NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-2295, web site last accessed December 22, 2016. 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:H/I:N/A:N).CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, web site last accessed May 24, 2016.
The web application does not sufficiently verify whether a well-formed, consistent request was intentionally provided by the user who submitted the request.
CVE-2016-2285NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-2285, web site last accessed December 22, 2016. has been assigned to this vulnerability. A CVSS v3 base score of 9.6 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H).CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H, web site last accessed December 22, 2016.
By default, no password is set on the device.
CVE-2016-2286NVD, https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-2286, web site last accessed December 22, 2016. 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:H/I:N/A:N).CVSS Calculator, https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, web site last accessed May 24, 2016.
These vulnerabilities could be exploited remotely.
No known public exploits specifically target these vulnerabilities.
An attacker with a low skill would be able to exploit these vulnerabilities.
Moxa recommends disabling Ports TCP/80 (HTTP) and TCP/23 (TELNET). Moxa indicates that users should ensure that Ports UDP/161 (SNMP), UDP/4800 (utility), and TCP/4900 (utility) are only accessible by trusted systems and that restricting access to Ports UDP/4800 and TCP/4900 will impact remote systems administration.
Ensure the passwords have been enabled.
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 at: http://ics-cert.us-cert.gov/content/recommended-practices. 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 (http://ics-cert.us-cert.gov/).
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.
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CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
67.9%