medium
6.5
CWE
88
Advisory Published
Updated

CVE-2020-5657

First published: Mon Nov 02 2020(Updated: )

Improper neutralization of argument delimiters in a command ('Argument Injection') 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 unauthenticated attackers on adjacent network to stop the network functions of the products via a specially crafted packet.

Credit: vultures@jpcert.or.jp

Affected SoftwareAffected VersionHow 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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Reference Links

Frequently Asked Questions

  • What is CVE-2020-5657?

    CVE-2020-5657 is a vulnerability related to improper neutralization of argument delimiters in a command ('Argument Injection').

  • Which software is affected by CVE-2020-5657?

    The MELSEC iQ-R series firmware, specifically the RJ71EIP91 EtherNet/IP Network Interface Module and RJ71PN92 PROFINET IO Controller Module, are affected by CVE-2020-5657.

  • What is the severity of CVE-2020-5657?

    CVE-2020-5657 has a severity rating of 6.5 (medium).

  • How can I fix CVE-2020-5657?

    To fix CVE-2020-5657, apply the firmware updates provided by Mitsubishi Electric.

  • Where can I find more information about CVE-2020-5657?

    You can find more information about CVE-2020-5657 on the JVN and Mitsubishi Electric PSIRT websites.

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