high
8.6
CWE
20 400
Advisory Published
Updated

CVE-2020-16850: Input Validation

First published: Mon Nov 30 2020(Updated: )

Mitsubishi MELSEC iQ-R Series PLCs with firmware 49 allow an unauthenticated attacker to halt the industrial process by sending a crafted packet over the network. This denial of service attack exposes Improper Input Validation. After halting, physical access to the PLC is required in order to restore production, and the device state is lost. This is related to R04CPU, RJ71GF11-T2, R04CPU, and RJ71GF11-T2.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Mitsubishi Electric MELSEC iQ-R Series R00/01/02CPU
Mitsubishi Electric MELSEC iQ-R Series R04/08/16/32/120(EN)CPU
Mitsubishi Electric R08/16/32/120SFCPU
Mitsubishi Electric R08/16/32/120PCPU
Mitsubishi Electric R00CPU Firmware<=20
Mitsubishi Electric R00CPU
Mitsubishi Electric R01CPU<=20
Mitsubishi Electric R01CPU
Mitsubishielectric R02cpu<=20
Mitsubishielectric R02cpu Firmware
Mitsubishi Electric R04CPU<=52
Mitsubishi Electric R04CPU
Mitsubishi Electric R08CPU Firmware<=52
Mitsubishi Electric R08CPU Firmware
Mitsubiushi Electric R16cpu Firmware<=52
Mitsubishi Electric R16CPU
Mitsubishielectric R32cpu<=52
Mitsubishielectric R32cpu Firmware
Mitsubishi Electric R120CPU<=52
Mitsubishi Electric R120PCPU
Mitsubishi Electric R08SFCpu<=22
Mitsubishi Electric R08SFCpu
Mitsubishi Electric R16SFCpu Firmware<=22
Mitsubishi Electric R16SFCpu Firmware
Mitsubishi Electric R32SFCpu<=22
Mitsubishielectric R32sfcpu Firmware
Mitsubishi Electric R120SFCPU<=22
Mitsubishielectric R120sfcpu Firmware
Mitsubishi Electric R08PCPU Firmware
Mitsubishi Electric R08CPU Firmware
Mitsubishi Electric R16PCPU Firmware
Mitsubishi Electric R16PCPU Firmware
Mitsubishielectric R32pcpu Firmware
Mitsubishi Electric R32PCPU
Mitsubishi Electric R120CPU
Mitsubishi Electric R120PCPU
Mitsubishielectric R16mtcpu
Mitsubishielectric R16mtcpu Firmware
Mitsubishielectric R32mtcpu Firmware
Mitsubishi Electric R32MTCPU
Mitsubishi Electric R64MTCPU Firmware
Mitsubishi Electric R64MTCPU Firmware

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the vulnerability ID for this issue?

    The vulnerability ID for this issue is CVE-2020-16850.

  • What is the severity rating of CVE-2020-16850?

    CVE-2020-16850 has a severity rating of 7.5 (high).

  • What is the affected software?

    The affected software is Mitsubishi MELSEC iQ-R Series PLCs with firmware versions up to 49.

  • How can an attacker exploit this vulnerability?

    An unauthenticated attacker can exploit this vulnerability by sending a crafted packet over the network to halt the industrial process.

  • How can I mitigate this vulnerability?

    To mitigate this vulnerability, it is recommended to update the firmware of the affected Mitsubishi MELSEC iQ-R Series PLCs to version 20 or higher.

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