10 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8 High
AI Score
Confidence
High
0.007 Low
EPSS
Percentile
80.9%
Successful exploitation of these vulnerabilities could allow a remote attacker to cause a denial-of-service condition or remote code execution.
The following models of GOT2000 CoreOS Version -Y and earlier are affected:
The vulnerability could allow a malicious attacker to crash the device, which could lead to remote code execution.
CVE-2020-5595 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
The vulnerability could allow a malicious attacker to cause a denial-of-service of TCP connection.
CVE-2020-5596 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).
3.2.3 NULL POINTER DEREFERENCE CWE-476
The vulnerability could allow a malicious attacker to cause a denial-of-service condition and crash the device.
CVE-2020-5597 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).
The vulnerability could allow a malicious attacker authentication to access sensitive resources, cause a denial-of-service condition, and crash the device.
CVE-2020-5598 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
The vulnerability could allow an attacker to cause a denial-of-service condition.
CVE-2020-5599 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been assigned; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H).
The vulnerability could allow an attacker to obtain sensitive information.
CVE-2020-5600 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).
Mitsubishi Electric PSIRT reported these vulnerabilities to CISA.
Mitsubishi recommends users follow the steps below to update CoreOS to the latest version:
Please contact your local Mitsubishi sales office about MELSOFT GT Designer3 (2000).
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 us-cert.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 us-cert.gov in the Technical Information Paper, ICS-TIP-12-146-01B–Targeted 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 these vulnerabilities.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-5595
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-5596
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-5597
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-5599
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-5600
cwe.mitre.org/data/definitions/119.html
cwe.mitre.org/data/definitions/284.html
cwe.mitre.org/data/definitions/284.html
cwe.mitre.org/data/definitions/384.html
cwe.mitre.org/data/definitions/399.html
cwe.mitre.org/data/definitions/476.html
cwe.mitre.org/data/definitions/88.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Mitsubishi%20Electric%20GOT2000%20Series+https://www.cisa.gov/news-events/ics-advisories/icsa-20-189-02
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www.oig.dhs.gov/
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-20-189-02
www.us-cert.gov/ics
www.us-cert.gov/ics
www.us-cert.gov/ics/alerts/ICS-ALERT-10-301-01
www.us-cert.gov/ics/recommended-practices
www.us-cert.gov/ics/tips/ICS-TIP-12-146-01B
www.us-cert.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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mailto:?subject=Mitsubishi%20Electric%20GOT2000%20Series&body=www.cisa.gov/news-events/ics-advisories/icsa-20-189-02
10 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8 High
AI Score
Confidence
High
0.007 Low
EPSS
Percentile
80.9%