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CVE-2021-20611

Quick assessment

Affected
Mitsubishi Electric Corporation MELSEC iQ-R Series R00CPU
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mitsubishi Electric MELSEC iQ-R series是日本三菱电机（Mitsubishi Electric）公司的一款可编程逻辑控制器。 Mitsubishi Electric MELSEC iQ-R series 存在输入验证错误漏洞，该漏洞源于没有正确控制有限资源的分配和维护，从而使行为者能够影响消耗的资源量，最终导致可用资源枯竭。以下产品和版本受到影响：MELSEC iQ-R series,Mitsubishi Electric MELSEC Q series,MELSEC-

CVSS 7.5 · High EPSS 3.18% · P88

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-20611

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Input Validation vulnerability in Mitsubishi Electric MELSEC iQ-R Series R00/01/02CPU, MELSEC iQ-R Series R04/08/16/32/120(EN)CPU, MELSEC iQ-R Series R08/16/32/120SFCPU, MELSEC iQ-R Series R08/16/32/120PCPU, MELSEC iQ-R Series R08/16/32/120PSFCPU, MELSEC iQ-R Series R16/32/64MTCPU, MELSEC iQ-R Series R12CCPU-V, MELSEC Q Series Q03UDECPU, MELSEC Q Series Q04/06/10/13/20/26/50/100UDEHCPU, MELSEC Q Series Q03/04/06/13/26UDVCPU, MELSEC Q Series Q04/06/13/26UDPVCPU, MELSEC Q Series Q12DCCPU-V, MELSEC Q Series Q24DHCCPU-V(G), MELSEC Q Series Q24/26DHCCPU-LS, MELSEC Q Series MR-MQ100, MELSEC Q Series Q172/173DCPU-S1, MELSEC Q Series Q172/173DSCPU, MELSEC Q Series Q170MCPU, MELSEC Q Series Q170MSCPU(-S1), MELSEC L Series L02/06/26CPU(-P), MELSEC L Series L26CPU-(P)BT and MELIPC Series MI5122-VW allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending specially crafted packets. System reset is required for recovery.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Mitsubishi Electric MELSEC iQ-R series 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mitsubishi Electric MELSEC iQ-R series是日本三菱电机（Mitsubishi Electric）公司的一款可编程逻辑控制器。 Mitsubishi Electric MELSEC iQ-R series 存在输入验证错误漏洞，该漏洞源于没有正确控制有限资源的分配和维护，从而使行为者能够影响消耗的资源量，最终导致可用资源枯竭。以下产品和版本受到影响：MELSEC iQ-R series,Mitsubishi Electric MELSEC Q series,MELSEC-
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mitsubishi Electric Corporation MELSEC iQ-R Series R00CPU Firmware versions "24" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R01CPU Firmware versions "24" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R02CPU Firmware versions "24" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R04CPU Firmware versions "57" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R08CPU Firmware versions "57" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R16CPU Firmware versions "57" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R32CPU Firmware versions "57" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R120CPU Firmware versions "57" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R04ENCPU Firmware versions "57" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R08ENCPU Firmware versions "57" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R16ENCPU Firmware versions "57" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R32ENCPU Firmware versions "57" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R120ENCPU Firmware versions "57" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R08SFCPU Firmware versions "26" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R16SFCPU Firmware versions "26" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R32SFCPU Firmware versions "26" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R120SFCPU Firmware versions "26" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R08PCPU Firmware versions "29" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R16PCPU Firmware versions "29" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R32PCPU Firmware versions "29" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R120PCPU Firmware versions "29" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R08PSFCPU Firmware versions "08" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R16PSFCPU Firmware versions "08" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R32PSFCPU Firmware versions "08" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R120PSFCPU Firmware versions "08" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R16MTCPU Operating system software version "23" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R32MTCPU Operating system software version "23" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R64MTCPU Operating system software version "23" and prior -
Mitsubishi Electric Corporation MELSEC iQ-R Series R12CCPU-V Firmware versions "16" and prior -
Mitsubishi Electric Corporation MELSEC Q Series Q03UDECPU The first 5 digits of serial No. "23121" and prior -

II. Public POCs for CVE-2021-20611

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III. Intelligence Information for CVE-2021-20611

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Vendor Advisories for CVE-2021-20611 (2)

Same Patch Batch · Mitsubishi Electric Corporation · 2021-12-01 · 3 CVEs total

CVE-2021-20610 7.5 HIGH 多款Mitsubishi Electric产品安全漏洞
CVE-2021-20609 7.5 HIGH Mitsubishi Electric MELSEC Q series 资源管理错误漏洞

IV. Related Vulnerabilities

Same product: MELSEC iQ-R Series R00CPU
Same vendor: Mitsubishi Electric Corporation
Same weakness: CWE-20

V. Comments for CVE-2021-20611

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