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 BMXP342020H firmware<3.40
schneider-electric BMXP342020H firmware
Schneider Electric BMXNOE0100 Firmware
schneider-electric bmxnoe0100
schneider-electric BMXNOE0110H
schneider-electric BMXNOE0110H
schneider-electric BMXNOC0401
Schneider Electric Modicon M340 BMXNOC0401
schneider-electric BMXNOR0200H RTU
Schneider Electric BMXNOR200H
Schneider Electric Modicon TSXP574634 Firmware
schneider-electric TSXP574634 firmware
schneider-electric TSXP575634
schneider-electric tsxp575634mc
Schneider Electric TSXP576634 Firmware
schneider-electric tsxp576634mc
Schneider Electric 140CPU65150 Firmware
Schneider Electric 140CPU65150 Firmware
schneider-electric 140NOE771x1 firmware
Schneider Electric 140 NOE 771x1 Firmware
Schneider Electric 140NOC78x00 Firmware
Schneider Electric 140NOC78x00 Firmware
Schneider Electric 140NOC77101 Firmware
Schneider Electric 140NOC77101 Firmware
Schneider Electric TSXETY4103 Firmware
Schneider Electric TSXETY4103C
schneider-electric tsxety5103c firmware
schneider-electric TSXETY5103 firmware
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 BMXNOE0110H
schneider-electric BMXNOE0110H
All of
schneider-electric BMXNOC0401
Schneider Electric Modicon M340 BMXNOC0401
All of
schneider-electric BMXNOR0200H RTU
Schneider Electric BMXNOR200H
All of
Schneider Electric Modicon TSXP574634 Firmware
schneider-electric TSXP574634 firmware
All of
schneider-electric TSXP575634
schneider-electric tsxp575634mc
All of
Schneider Electric TSXP576634 Firmware
schneider-electric tsxp576634mc
All of
Schneider Electric 140CPU65150 Firmware
Schneider Electric 140CPU65150 Firmware
All of
schneider-electric 140NOE771x1 firmware
Schneider Electric 140 NOE 771x1 Firmware
All of
Schneider Electric 140NOC78x00 Firmware
Schneider Electric 140NOC78x00 Firmware
All of
Schneider Electric 140NOC77101 Firmware
Schneider Electric 140NOC77101 Firmware
All of
Schneider Electric TSXETY4103 Firmware
Schneider Electric TSXETY4103C
All of
schneider-electric tsxety5103c firmware
schneider-electric TSXETY5103 firmware

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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