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AUSCERT External Security Bulletin Redistribution
ESB-2023.0622
Advisory (icsa-23-033-02) Mitsubishi Electric GOT2000 Series
and GT SoftGOT2000
3 February 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: Mitsubishi Electric GOT2000 Series
GT SoftGOT2000
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2022-40269 CVE-2022-40268
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-23-033-02
Comment: CVSS (Max): 7.4 CVE-2022-40269 (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
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ICS Advisory (ICSA-23-033-02)
Mitsubishi Electric GOT2000 Series and GT SoftGOT2000
Original release date: February 02, 2023
Legal Notice
All information products included in https://us-cert.cisa.gov/ics are provided
"as is" for informational purposes only. The Department of Homeland Security
(DHS) does not provide any warranties of any kind regarding any information
contained within. DHS does not endorse any commercial product or service,
referenced in this product or otherwise. Further dissemination of this product
is governed by the Traffic Light Protocol (TLP) marking in the header. For more
information about TLP, see https://us-cert.cisa.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 6.8
o ATTENTION: Exploitable remotely
o Vendor: Mitsubishi Electric Corporation
o Equipment: GOT Mobile Function on GOT2000 Series and GT SoftGOT2000
o Vulnerabilities: Authentication Bypass by Spoofing, Improper Restriction of
Rendered UI Layers or Frames
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow attackers to
perform unintended operations through clickjacking (an attack that tricks users
into clicking an invisible or disguised webpage element) or allow attackers to
disclose sensitive information from their browsers or impersonate legitimate
users by abusing inappropriate HTML attributes.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Mitsubishi Electric reports these vulnerabilities affect the GOT Mobile
Function on the following products:
o GOT2000 Series:
GT27 model: GOT Mobile versions 01.14.000-01.47.000
GT25 model: GOT Mobile versions 01.14.000-01.47.000
o GT SoftGOT2000: software versions 1.265B-1.285X
3.2 VULNERABILITY OVERVIEW
3.2.1 AUTHENTICATION BYPASS BY SPOOFING CWE-290
This vulnerability could allow an attacker to impersonate legitimate users by
abusing inappropriate HTML attributes or cause users' browsers to disclose
sensitive information.
CVE-2022-40269 has been assigned to this vulnerability. A CVSS v3 base score of
6.8 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:R/S:U/
C:H/I:H/A:N ).
3.2.2 IMPROPER RESTRICTION OF RENDERED UI LAYERS OR FRAMES CWE-1021
This vulnerability could allow an attacker to lead legitimate users to perform
unintended operations through clickjacking.
CVE-2022-40268 has been assigned to this vulnerability. A CVSS v3 base score of
6.1 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:R/S:C/
C:N/I:H/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Japan
3.4 RESEARCHER
Mitsubishi Electric reported these vulnerabilities to CISA.
4. MITIGATIONS
Mitsubishi Electric recommends users update to the latest software versions.
Mitsubishi Electric's security advisory contains step-by-step update
instructions :
o GOT2000 Series
GT27 model: Update to GOT Mobile version 01.48.000 or later.
GT25 model: Update to GOT Mobile version 01.48.000 or later.
o GT SoftGOT2000: Update to software version 1.290C or later.
Mitsubishi Electric recommends users take the following mitigations to minimize
the exploitation risk of these vulnerabilities:
o When internet access is required, use a firewall, virtual private network
(VPN), etc. to prevent unauthorized access.
o Use devices within a local area network (LAN) and block access from
untrusted networks and hosts.
o Install antivirus software on hosts running affected software/firmware.
o Use the IP filter function to control access via IP address.
GT Designer3 (GOT2000) Screen Design Manual (SH-081220ENG). "5.4.3
Setting the IP filter"
o Disable GOT Mobile Function.
Users should refer to Mitsubishi Electric's security advisory for further
information.
CISA recommends users take defensive measures to minimize the risk of
exploitation these vulnerabilities. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls and
isolate them from business networks.
o When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing VPNs may have vulnerabilities and should be
updated to the most current version available. Also recognize VPN is only
as secure as its connected devices.
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 at cisa.gov/ics . Several CISA products detailing cyber
defense best 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 at cisa.gov/ics in the technical information paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing suspected malicious activity should follow established
internal procedures and report 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:
o Do not click web links or open attachments in unsolicited email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
No known public exploits specifically target these vulnerabilities. These
vulnerabilities are exploitable remotely. These vulnerabilities have a high
attack complexity.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.
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