high
7.5
CWE
20
Advisory Published
Updated

CVE-2021-22787: Input Validation

First published: Fri Feb 11 2022(Updated: )

A CWE-20: Improper Input Validation vulnerability exists that could cause denial of service of the device when an attacker sends a specially crafted HTTP request to the web server of the device. Affected Product: Modicon M340 CPUs: BMXP34 (Versions prior to V3.40), Modicon M340 X80 Ethernet Communication Modules: BMXNOE0100 (H), BMXNOE0110 (H), BMXNOC0401, BMXNOR0200H RTU (All Versions), Modicon Premium Processors with integrated Ethernet (Copro): TSXP574634, TSXP575634, TSXP576634 (All Versions), Modicon Quantum Processors with Integrated Ethernet (Copro): 140CPU65xxxxx (All Versions), Modicon Quantum Communication Modules: 140NOE771x1, 140NOC78x00, 140NOC77101 (All Versions), Modicon Premium Communication Modules: TSXETY4103, TSXETY5103 (All Versions)

Credit: cybersecurity@se.com cybersecurity@se.com

Affected SoftwareAffected VersionHow to fix
Schneider-electric Bmxp342020 Firmware<3.40
Schneider-electric Bmxp342020
Schneider-electric Bmxnoe0100 Firmware
Schneider-electric Bmxnoe0100
Schneider-electric Bmxnoe0110 Firmware
Schneider-electric Bmxnoe0110
Schneider-electric Bmxnoc0401 Firmware
Schneider-electric Bmxnoc0401
Schneider-electric Bmxnor0200h Rtu Firmware
Schneider-electric Bmxnor0200h Rtu
Schneider-electric Tsxp574634 Firmware
Schneider-electric Tsxp574634
Schneider-electric Tsxp575634 Firmware
Schneider-electric Tsxp575634
Schneider-electric Tsxp576634 Firmware
Schneider-electric Tsxp576634
Schneider-electric 140cpu65150 Firmware
Schneider-electric 140cpu65150
Schneider-electric 140noe771x1 Firmware
Schneider-electric 140noe771x1
Schneider-electric 140noc78x00 Firmware
Schneider-electric 140noc78x00
Schneider-electric 140noc77101 Firmware
Schneider-electric 140noc77101
Schneider-electric Tsxety4103 Firmware
Schneider-electric Tsxety4103
Schneider-electric Tsxety5103 Firmware
Schneider-electric Tsxety5103
All of
Schneider-electric Modicon M340 Bmxp342020 Firmware<3.40
Schneider-electric Modicon M340 Bmxp342020
All of
Schneider-electric Bmxnoe0100 Firmware
Schneider-electric Bmxnoe0100
All of
Schneider-electric Bmxnoe0110 Firmware
Schneider-electric Bmxnoe0110
All of
Schneider-electric Bmxnoc0401 Firmware
Schneider-electric Bmxnoc0401
All of
Schneider-electric Bmxnor0200h Rtu Firmware
Schneider-electric Bmxnor0200h Rtu
All of
Schneider-electric Tsxp574634 Firmware
Schneider-electric Tsxp574634
All of
Schneider-electric Tsxp575634 Firmware
Schneider-electric Tsxp575634
All of
Schneider-electric Tsxp576634 Firmware
Schneider-electric Tsxp576634
All of
Schneider-electric 140cpu65150 Firmware
Schneider-electric 140cpu65150
All of
Schneider-electric 140noe771x1 Firmware
Schneider-electric 140noe771x1
All of
Schneider-electric 140noc78x00 Firmware
Schneider-electric 140noc78x00
All of
Schneider-electric 140noc77101 Firmware
Schneider-electric 140noc77101
All of
Schneider-electric Tsxety4103 Firmware
Schneider-electric Tsxety4103
All of
Schneider-electric Tsxety5103 Firmware
Schneider-electric Tsxety5103

Remedy

https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-257-02

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-22787?

    CVE-2021-22787 is a vulnerability that exists in Schneider-electric Modicon M340 CPUs prior to V3.40 and could lead to denial of service when an attacker sends a specially crafted HTTP request.

  • Which products are affected by CVE-2021-22787?

    Modicon M340 CPUs with versions prior to V3.40 are affected by CVE-2021-22787.

  • What is the severity of CVE-2021-22787?

    CVE-2021-22787 has a severity value of 7.5 (high).

  • How can an attacker exploit CVE-2021-22787?

    An attacker can exploit CVE-2021-22787 by sending a specially crafted HTTP request to the web server of the affected device.

  • Is there a fix available for CVE-2021-22787?

    Yes, updating the Modicon M340 CPU firmware to version V3.40 or later will fix CVE-2021-22787.

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