high
7.5
CWE
200
Advisory Published
Updated

CVE-2021-22786: Infoleak

First published: Wed Feb 01 2023(Updated: )

A CWE-200: Information Exposure vulnerability exists that could cause the exposure of sensitive information stored on the memory of the controller when communicating over the Modbus TCP protocol. Affected Products: Modicon M340 CPU (part numbers BMXP34*) (Versions prior to V3.30), Modicon M580 CPU (part numbers BMEP* and BMEH*) (Versions prior to SV3.20), Modicon MC80 (BMKC80) (Versions prior to V1.6), Modicon M580 CPU Safety (part numbers BMEP58*S and BMEH58*S) (All Versions), Modicon Momentum MDI (171CBU*) (Versions prior to V2.3), Legacy Modicon Quantum (All Versions)

Credit: cybersecurity@se.com

Affected SoftwareAffected VersionHow to fix
Schneider Electric Modicon M340 BMXP341000 Firmware<3.40
Schneider Electric Modicon M340 BMXP341000
Schneider Electric Modicon M340 BMXP342000 Firmware<3.40
Schneider Electric Modicon M340 BMXP342000 Firmware
Schneider Electric Modicon M340 BMXP342010 Firmware<3.40
Schneider Electric Modicon M340 BMXP342010 Firmware
Schneider Electric Modicon M340 BMXP3420102 Firmware<3.40
Schneider Electric Modicon M340 BMXP3420102
Schneider Electric Modicon M340 BMXP342020 Firmware<3.40
Schneider Electric Modicon M340 BMXP342020
Schneider Electric Modicon M340 BMXP342020H Firmware<3.40
Schneider Electric Modicon M340 BMXP342020H
Schneider Electric Modicon M340 BMXP342030 Firmware<3.40
Schneider Electric Modicon M340 BMXP342030H
Schneider Electric Modicon M340 BMXP3420302 Firmware<3.40
Schneider Electric Modicon M340 BMXP3420302 Firmware
Schneider Electric Modicon M340 BMXP3420302H Firmware<3.40
Schneider Electric Modicon M340 BMXP3420302H Firmware
Schneider Electric Modicon M340 BMXP342030H Firmware<3.40
Schneider Electric Modicon M340 BMXP342030H
Schneider Electric Modicon M580 BMEH582040 Firmware<=3.20
schneider-electric Modicon M580
Schneider Electric Modicon M580 Firmware<=3.20
Modicon M580
Schneider Electric Modicon M580 Firmware<=3.20
schneider-electric Modicon M580
Schneider Electric Modicon M580 BMEH584040 Firmware<=3.20
schneider-electric Modicon M580 bmeh584040c
Schneider Electric Modicon M580 Firmware<=3.20
schneider-electric Modicon M580 bmeh584040c firmware
Schneider Electric Modicon M580 BMEH584040S Firmware<=3.20
Schneider Electric Modicon M580 BMEH584040S Firmware
Schneider Electric Modicon M580<=3.20
Schneider Electric Modicon M580
Schneider Electric Modicon M580 Firmware<=3.20
Schneider Electric Modicon M580
Schneider Electric Modicon M580 Firmware<=3.20
Schneider Electric Modicon M580
Modicon M580<=3.20
Schneider Electric Modicon M580 BMEP581020
schneider-electric Modicon M580 BMEP581020 firmware<=3.20
schneider-electric Modicon M580 BMEP581020H firmware
Schneider Electric Modicon M580 BMEP582020 Firmware<=3.20
Modicon M580
Schneider Electric Modicon M580 Firmware<=3.20
Modicon M580
Schneider Electric Modicon M580 BMEP582040 Firmware<=3.20
schneider-electric Modicon M580
schneider-electric Modicon M580 bmep582040h firmware<=3.20
schneider-electric Modicon M580
Schneider Electric Modicon M580 BMEP582040 Firmware<=3.20
Schneider Electric Modicon M580 BMEP582040S
Schneider Electric Modicon M580 BMEP583020 Firmware<=3.20
Schneider Electric Modicon M580 BMEP583020
Schneider Electric Modicon M580 BMEP583040 Firmware<=3.20
Schneider Electric Modicon M580 BMEP583040
Schneider Electric Modicon M580 BMEP584020 Firmware<=3.20
Schneider Electric Modicon M580 BMEP584020 Firmware
Schneider Electric Modicon M580 BMEP584040 Firmware<=3.20
Schneider Electric Modicon M580 BMEP584040 Firmware
Schneider Electric Modicon M580 BMEP584040S Firmware<=3.20
Schneider Electric Modicon M580 BMEP584040S Firmware
schneider-electric Modicon M580 BMEP585040C Firmware<=3.20
schneider-electric Modicon M580 BMEP585040C Firmware
Schneider Electric Modicon M580 BMEP585040C Firmware<=3.20
schneider-electric Modicon M580 BMEP585040C Firmware
schneider-electric Modicon M580 bmep586040c firmware<=3.20
schneider-electric modicon m580 bmep586040 firmware
Schneider Electric Modicon M580 BMEP585040C Firmware<=3.20
schneider-electric Modicon M580 bmep586040c firmware
Schneider Electric Modicon Momentum 171CBU78090<2.4
Schneider Electric Modicon Momentum 171CBU78090
Schneider Electric Modicon Momentum 171CBU98090<2.4
Schneider Electric Modicon Momentum 171CBU98090
Schneider Electric Modicon Momentum 171CBU98091 Firmware<2.4
Schneider Electric Modicon Momentum 171CBU98091 Firmware
Schneider Electric Modicon MC80 BMKC8020301<1.70
schneider-electric modicon mc80 bmkc8020301 firmware
Modicon MC80 Firmware<1.70
Modicon MC80 Firmware
Modicon MC80 Firmware<1.70
Schneider Electric Modicon MC80

Remedy

https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-221-04&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2022-221-04-Modicon_Controllers_Ethernet_Modules_Security_Notification.pdf

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-22786?

    CVE-2021-22786 has been classified as a CWE-200: Information Exposure vulnerability, indicating a potentially high impact on the confidentiality of sensitive information stored in memory.

  • How do I fix CVE-2021-22786?

    To mitigate CVE-2021-22786, apply updates to the Modicon M340 CPUs to versions V3.30 or later, and the Modicon M580 CPUs to versions V3.20 or later.

  • Which products are affected by CVE-2021-22786?

    CVE-2021-22786 affects Schneider Electric Modicon M340 CPUs with part numbers BMXP34* and Modicon M580 CPUs with specific firmware versions prior to the mentioned updates.

  • What type of data is exposed in CVE-2021-22786?

    CVE-2021-22786 can lead to the exposure of sensitive information stored in the memory of affected controllers during communication over the Modbus TCP protocol.

  • Can CVE-2021-22786 be exploited remotely?

    Yes, CVE-2021-22786 can be exploited remotely when the affected devices communicate over the Modbus TCP protocol without proper security measures.

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