What is CVE-2020-5658?

CVE-2020-5658 is a vulnerability in the TCP/IP function included in the firmware of MELSEC iQ-R series.

Which devices are affected by CVE-2020-5658?

Devices with RJ71EIP91 EtherNet/IP Network Interface Module (first 2 digits of serial number are '02' or before) or RJ71PN92 PROFINET IO Controller Module (first 2 digits of serial number are '01' or before) are affected by CVE-2020-5658.

What is the severity of CVE-2020-5658?

CVE-2020-5658 has a severity rating of 7.5 (high).

How does CVE-2020-5658 affect the MELSEC iQ-R series?

CVE-2020-5658 allows remote attackers to execute arbitrary code via a crafted packet to the TCP/IP function of the affected devices.

How can I fix CVE-2020-5658?

Apply the provided firmware update from Mitsubishi Electric to mitigate the vulnerability.

Vulnerability/
CVE-2020-5658

high

7.5

2/11/2020

21/7/2021

CVE-2020-5658

First published: Mon Nov 02 2020(Updated: )

Resource Management Errors vulnerability in TCP/IP function included in the firmware of MELSEC iQ-R series (RJ71EIP91 EtherNet/IP Network Interface Module First 2 digits of serial number are '02' or before, RJ71PN92 PROFINET IO Controller Module First 2 digits of serial number are '01' or before, RD81DL96 High Speed Data Logger Module First 2 digits of serial number are '08' or before, RD81MES96N MES Interface Module First 2 digits of serial number are '04' or before, and RD81OPC96 OPC UA Server Module First 2 digits of serial number are '04' or before) allows a remote unauthenticated attacker to stop the network functions of the products via a specially crafted packet.

Credit: vultures@jpcert.or.jp

Affected Software	Affected Version	How to fix
Mitsubishielectric Melsec Iq-rj71eip91 Firmware
Mitsubishielectric Melsec Iq-rj71eip91
Mitsubishielectric Melsec Iq-rj71pn92 Firmware
Mitsubishielectric Melsec Iq-rj71pn92
Mitsubishielectric Melsec Iq-rd81dl96 Firmware
Mitsubishielectric Melsec Iq-rd81dl96
Mitsubishielectric Melsec Iq-rd81mes96n Firmware
Mitsubishielectric Melsec Iq-rd81mes96n
Mitsubishielectric Melsec Iq-rd81opc96 Firmware
Mitsubishielectric Melsec Iq-rd81opc96

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Frequently Asked Questions

What is CVE-2020-5658?
CVE-2020-5658 is a vulnerability in the TCP/IP function included in the firmware of MELSEC iQ-R series.
Which devices are affected by CVE-2020-5658?
Devices with RJ71EIP91 EtherNet/IP Network Interface Module (first 2 digits of serial number are '02' or before) or RJ71PN92 PROFINET IO Controller Module (first 2 digits of serial number are '01' or before) are affected by CVE-2020-5658.
What is the severity of CVE-2020-5658?
CVE-2020-5658 has a severity rating of 7.5 (high).
How does CVE-2020-5658 affect the MELSEC iQ-R series?
CVE-2020-5658 allows remote attackers to execute arbitrary code via a crafted packet to the TCP/IP function of the affected devices.
How can I fix CVE-2020-5658?
Apply the provided firmware update from Mitsubishi Electric to mitigate the vulnerability.

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