6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
0.002 Low
EPSS
Percentile
52.0%
Successful exploitation of this vulnerability could allow an attacker to cause a denial-of-service condition by sending a specially crafted command.
The following Mitsubishi Electric GOT2000 Series products are affected:
3.2.1 IMPROPER INPUT VALIDATION CWE-20
The affected GOT2000 Series devices with FTP server versions 01.39.000 and prior are vulnerable to improper input validation, which could allow an attacker to cause a denial-of-service condition by sending a specially crafted command.
CVE-2022-40266 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H).
Mitsubishi Electric reported this vulnerability to CISA.
Mitsubishi Electric recommends users update to the latest software versions:
The following steps were provided by Mitsubishi Electric to assist users in applying the update:
1. Download the fixed version of GT Designer3 Version1 (GOT2000) and install on a compatible device.
2. Start the GT Designer3 Version1 (GOT2000) and open the project data used in affected products.
3. Select [Write to GOT] from [Communication] menu to write the required package data to the GOT.
4. After writing the required package data to the GOT, refer to the <How to check the versions in use> and ensure the software has been updated to the fixed versions.
Mitsubishi Electric also recommends users to take steps to mitigate risk of vulnerability exploitation:
Users should refer to Mitsubishi Electricโs security advisory for further information.
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/ics 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/ics in the Technical Information Paper, ICS-TIP-12-146-01BโTargeted 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.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
No known public exploits specifically target this vulnerability. This vulnerability has a high attack complexity.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-40266
cisa.gov/ics
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cwe.mitre.org/data/definitions/20.html
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www.cisa.gov/uscert/ics/recommended-practices
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
www.cisa.gov/uscert/ncas/tips/ST04-014
www.cisa.gov/uscert/sites/default/files/publications/emailscams_0905.pdf
www.cisa.gov/uscert/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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