CVE-2021-20591

Uncontrolled Resource Consumption vulnerability in Mitsubishi Electric MELSEC iQ-R series CPU modules (R00/01/02CPU all versions, R04/08/16/32/120(EN)CPU all versions, R08/16/32/120SFCPU all versions, R08/16/32/120PCPU all versions, R08/16/32/120PSFCPU all versions) allows a remote unauthenticated attacker to prevent legitimate clients from connecting to the MELSOFT transmission port (TCP/IP) by not closing a connection properly, which may lead to a denial of service (DoS) condition.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
MitsubishiCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 64%
VendorProductVersion
mitsubishielectricr00cpu_firmware
*
mitsubishielectricr01cpu_firmware
*
mitsubishielectricr02cpu_firmware
*
mitsubishielectricr04cpu_firmware
*
mitsubishielectricr08cpu_firmware
*
mitsubishielectricr16cpu_firmware
*
mitsubishielectricr32cpu_firmware
*
mitsubishielectricr120cpu_firmware
*
mitsubishielectricr08sfcpu_firmware
*
mitsubishielectricr16sfcpu_firmware
*
mitsubishielectricr32sfcpu_firmware
*
mitsubishielectricr120sfcpu_firmware
*
mitsubishielectricr08pcpu_firmware
*
mitsubishielectricr16pcpu_firmware
*
mitsubishielectricr32pcpu_firmware
*
mitsubishielectricr120pcpu_firmware
*
mitsubishielectricr08psfcpu_firmware
*
mitsubishielectricr16psfcpu_firmware
*
mitsubishielectricr32psfcpu_firmware
*
mitsubishielectricr120psfcpu_firmware
*
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://jvn.jp/vu/JVNVU98060539/index.html
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-003_en.pdf
https://jvn.jp/vu/JVNVU98060539/index.html
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-003_en.pdf