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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.6 High
AI Score
Confidence
High
0.004 Low
EPSS
Percentile
73.0%
This updated advisory is a follow-up to the advisory update titled ICSA-20-343-02 Mitsubishi Electric GOT and Tension Controller (Update A) that was published May 11, 2021, to the ICS webpage on www.cisa.gov/uscert/ics.
Successful exploitation of this vulnerability could allow malicious attackers to cause deterioration of communication performance or cause a denial-of-service condition of the TCP communication functions of the products requiring a re-boot of the device to recover.
Mitsubishi Electric reports that the vulnerability affects the following human-machine interface (GOT) and Tension Controller products:
--------- Begin Update B Part 1 of 2 ---------
Refer to the user manual to determine which version is in use. The latest version of the manual of GOT is available at the Mitsubishi Electric Global Website. Contact a Mitsubishi Electric representative for the latest version of the Tension Controller manual.
--------- End Update B Part 1 of 2 ---------
There is an out-of-bounds read vulnerability that may allow attackers to cause deterioration in communication performance or cause a denial-of-service condition of the TCP communication functions of the products by sending specially crafted packets.
CVE-2020-5675 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Mitsubishi Electric reported this vulnerability to CISA.
--------- Begin Update B Part 2 of 2 ---------
Mitsubishi Electric has fixed the basic system application for GOT2000 series GT21 model or GOT SIMPLE series GS21 model, which is shipped with GT Designer3 (2000) versions 1.255R or later.
To apply version v01.40.000 or later to GOT2000 series GT21 model or GOT SIMPLE series GS21 model, use the following update procedure:
Mitsubishi Electric has provided the following procedure to update the tension controller to Version 1.01 or later:
--------- End Update B Part 2 of 2 ---------
Until the update can be applied, Mitsubishi Electric asks that users restrict access to the product only from trusted networks and hosts.
Please refer to the Mitsubishi Electric website for details.
Additional information about the vulnerability or Mitsubishi Electric recommendations is available by contacting a Mitsubishi Electric representative.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
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 cisa.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 cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies.
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.
No known public exploits specifically target this vulnerability.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-5675
cwe.mitre.org/data/definitions/125.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
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us-cert.cisa.gov/ics
www.cisa.gov/uscert/ics
www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
www.cisa.gov/uscert/ics/recommended-practices
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
www.cisa.gov/uscert/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
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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:N/I:N/A:H
www.instagram.com/cisagov
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www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-017_en.pdf
www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-017_en.pdf
www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-017_en.pdf
www.mitsubishielectric.com/fa
www.mitsubishielectric.com/fa/support/index.html
www.mitsubishielectric.com/fa/support/index.html
www.mitsubishielectric.com/fa/support/index.html
www.mitsubishielectric.com/fa/support/index.html
www.mitsubishielectric.com/fa/support/index.html
www.oig.dhs.gov/
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-20-343-02
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Mitsubishi%20Electric%20GOT%20and%20Tension%20Controller%20%28Update%20B%29&body=www.cisa.gov/news-events/ics-advisories/icsa-20-343-02
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.6 High
AI Score
Confidence
High
0.004 Low
EPSS
Percentile
73.0%