9.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
0.001 Low
EPSS
Percentile
44.1%
Successful exploitation of this vulnerability could allow an attacker to login to the product by sending specially crafted packets.
Mitsubishi Electric reports this vulnerability affects the following MELSEC-F Series products:
Mitsubishi Electric reports this vulnerability affects the following MELSEC-F Series products if they are used with ethernet communication special adapter FX3U-ENET-ADP or ethernet communication block FX3U-ENET(-L):
These products are sold in limited regions:
3.2.1 AUTHENTICATION BYPASS BY CAPTURE-REPLAY CWE-294
An authentication bypass vulnerability due to authentication bypass by capture-replay exists in the MELSEC-F series main modules.
CVE-2023-2846 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:H/A:N).
**CRITICAL INFRASTRUCTURE SECTORS:**Critical Manufacturing
**COUNTRIES/AREAS DEPLOYED:**These products are sold in limited regions.
COMPANY HEADQUARTERS LOCATION: Japan
Chun Liu, Xin Che, Ruilong Deng, Peng Cheng, and Jiming Chen from 307LAB, Zhejiang University reported this vulnerability to Mitsubishi Electric.
Mitsubishi Electric recommends customers take the following mitigation measures to minimize the risk of an attacker exploiting this vulnerability:
For specific update instructions and additional details, see the Mitsubishi Electric advisory.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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.
No known public exploits specifically target this vulnerability. This vulnerability is exploitable remotely. This vulnerability has low attack complexity.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-2846
cisa.gov/ics
cisa.gov/ics
cwe.mitre.org/data/definitions/294.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
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us-cert.cisa.gov/ics/Recommended-Practices
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
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:H/A:N
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www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2023-005_en.pdf
www.oig.dhs.gov/
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-23-180-04
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