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
5 Medium
CVSS2
Access Vector
NETWORK
Access 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
0.002 Low
EPSS
Percentile
54.6%
Successful exploitation of this vulnerability could allow a remote unauthenticated attacker to cause a denial-of-service condition on a target product by sending specially crafted packets.
The following Mitsubishi Electric MELSEC iQ-R Series products are affected:
3.2.1 IMPROPER INPUT VALIDATION CWE-20
MELSEC iQ-R Series RJ71EN71 products with firmware versions prior to β65β and R04/08/16/32/120ENCPU products with Network firmware versions prior to β65β are vulnerable to improper input validation. A remote unauthenticated user could cause a denial-of-service condition on a target product by sending specially crafted packets. A system reset is required to recover from a denial-of-service condition.
CVE-2022-40265 has been assigned to this vulnerability. A CVSS v3 base score of 8.6 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).
Mitsubishi Electric reported this vulnerability to CISA.
Mitsubishi Electric has fixed the vulnerability in the following MELSEC iQ-R Series products:
Users should refer to the following product manual for instructions to update firmware:
Mitsubishi Electric recommends users take the following mitigation measures to minimize the risk of an unauthenticated user exploiting this vulnerability:
Note: For using the IP filter function, users should see MELSEC iQ-R Ethernet Userβs Manual (Application) Security βIP filterβ
Users can refer to the Mitsubishi Electric advisory for further details.
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 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-12-146-01BβTargeted 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.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-40265
cisa.gov/ics
cisa.gov/ics
cwe.mitre.org/data/definitions/20.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/alerts/ICS-ALERT-10-301-01
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:C/C:N/I:N/A:H
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www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2022-017_en.pdf
www.mitsubishielectric.com/fa/download/index.html
www.mitsubishielectric.com/fa/download/index.html
www.mitsubishielectric.com/fa/download/index.html
www.oig.dhs.gov/
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-22-335-01
www.usa.gov/
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mailto:?subject=Mitsubishi%20Electric%20MELSEC%20iQ-R%20Series&body=www.cisa.gov/news-events/ics-advisories/icsa-22-335-01
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
5 Medium
CVSS2
Access Vector
NETWORK
Access 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
0.002 Low
EPSS
Percentile
54.6%