CVE-2021-22786: Infoleak

Published Feb 1, 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 BMEP58S and BMEH58S) (All Versions), Modicon Momentum MDI (171CBU) (Versions prior to V2.3), Legacy Modicon Quantum (All Versions)

Affected Software

82 affected components
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
Schneider-electric Modicon M340 Bmxp342010 Firmware<3.40
Schneider-electric Modicon M340 Bmxp342010
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 Bmxp342030
Schneider-electric Modicon M340 Bmxp3420302 Firmware<3.40
Schneider-electric Modicon M340 Bmxp3420302
Schneider-electric Modicon M340 Bmxp3420302h Firmware<3.40
Schneider-electric Modicon M340 Bmxp3420302h
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 Bmeh582040
Schneider-electric Modicon M580 Bmeh582040c Firmware<=3.20
Schneider-electric Modicon M580 Bmeh582040c
Schneider-electric Modicon M580 Bmeh582040s Firmware<=3.20
Schneider-electric Modicon M580 Bmeh582040s
Schneider-electric Modicon M580 Bmeh584040 Firmware<=3.20
Schneider-electric Modicon M580 Bmeh584040
Schneider-electric Modicon M580 Bmeh584040c Firmware<=3.20
Schneider-electric Modicon M580 Bmeh584040c
Schneider-electric Modicon M580 Bmeh584040s Firmware<=3.20
Schneider-electric Modicon M580 Bmeh584040s
Schneider-electric Modicon M580 Bmeh586040 Firmware<=3.20
Schneider-electric Modicon M580 Bmeh586040
Schneider-electric Modicon M580 Bmeh586040c Firmware<=3.20
Schneider-electric Modicon M580 Bmeh586040c
Schneider-electric Modicon M580 Bmeh586040s Firmware<=3.20
Schneider-electric Modicon M580 Bmeh586040s
Schneider-electric Modicon M580 Bmep581020 Firmware<=3.20
Schneider-electric Modicon M580 Bmep581020
Schneider-electric Modicon M580 Bmep581020h Firmware<=3.20
Schneider-electric Modicon M580 Bmep581020h
Schneider-electric Modicon M580 Bmep582020 Firmware<=3.20
Schneider-electric Modicon M580 Bmep582020
Schneider-electric Modicon M580 Bmep582020h Firmware<=3.20
Schneider-electric Modicon M580 Bmep582020h
Schneider-electric Modicon M580 Bmep582040 Firmware<=3.20
Schneider-electric Modicon M580 Bmep582040
Schneider-electric Modicon M580 Bmep582040h Firmware<=3.20
Schneider-electric Modicon M580 Bmep582040h
Schneider-electric Modicon M580 Bmep582040s 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
Schneider-electric Modicon M580 Bmep584040 Firmware<=3.20
Schneider-electric Modicon M580 Bmep584040
Schneider-electric Modicon M580 Bmep584040s Firmware<=3.20
Schneider-electric Modicon M580 Bmep584040s
Schneider-electric Modicon M580 Bmep585040 Firmware<=3.20
Schneider-electric Modicon M580 Bmep585040
Schneider-electric Modicon M580 Bmep585040c Firmware<=3.20
Schneider-electric Modicon M580 Bmep585040c
Schneider-electric Modicon M580 Bmep586040 Firmware<=3.20
Schneider-electric Modicon M580 Bmep586040
Schneider-electric Modicon M580 Bmep586040c Firmware<=3.20
Schneider-electric Modicon M580 Bmep586040c
Schneider-electric Modicon Momentum 171cbu78090 Firmware<2.4
Schneider-electric Modicon Momentum 171cbu78090
Schneider-electric Modicon Momentum 171cbu98090 Firmware<2.4
Schneider-electric Modicon Momentum 171cbu98090
Schneider-electric Modicon Momentum 171cbu98091 Firmware<2.4
Schneider-electric Modicon Momentum 171cbu98091
Schneider-electric Modicon Mc80 Bmkc8020301 Firmware<1.70
Schneider-electric Modicon Mc80 Bmkc8020301
Schneider-electric Modicon Mc80 Bmkc8020310 Firmware<1.70
Schneider-electric Modicon Mc80 Bmkc8020310
Schneider-electric Modicon Mc80 Bmkc8030311 Firmware<1.70
Schneider-electric Modicon Mc80 Bmkc8030311

Remediation

Patch Available

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

Event History

Feb 1, 2023
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
DescriptionSeverityWeakness
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Frequently Asked Questions

1

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.

2

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.

3

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.

4

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.

5

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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