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Modicon M340 Bmxp341000 Firmware CVE-2020-7543

HIGH
Improper Check for Unusual or Exceptional Conditions (CWE-754)
2020-12-11 cybersecurity@se.com
Denial Of Service Schneider Electric Modicon M340 Bmxp341000 Firmware Modicon M340 Bmxp342020 Firmware Modicon M340 Bmxp3420302 Firmware Modicon M340 Bmxp342000 Firmware Modicon M340 Bmxp3420102 Firmware Modicon M340 Bmxp3420102Cl Firmware Modicon M340 Bmxp3420302Cl Firmware Modicon M580 Bmep581020 Firmware Modicon M580 Bmep582020 Firmware Modicon M580 Bmep582040 Firmware Modicon M580 Bmep583020 Firmware Modicon M580 Bmep583040 Firmware Modicon M580 Bmep584020 Firmware Modicon M580 Bmep584040 Firmware Modicon M580 Bmep585040 Firmware Modicon M580 Bmep586040 Firmware
7.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

1
CVE Published
Dec 11, 2020 - 01:15 nvd
HIGH 7.5

DescriptionNVD

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications for affected versions), that could cause denial of service when a specially crafted Read Physical Memory request over Modbus is sent to the controller.

AnalysisAI

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-754. A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications for affected versions), that could cause denial of service when a specially crafted Read Physical Memory request over Modbus is sent to the controller. Affected products include: Schneider-Electric Modicon M580 Bmep584040 Firmware, Schneider-Electric Modicon M580 Bmep582040 Firmware, Schneider-Electric Modicon M580 Bmep586040 Firmware, Schneider-Electric Modicon M580 Bmep585040 Firmware, Schneider-Electric Modicon M580 Bmep582020 Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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CVE-2020-7543 vulnerability details – vuln.today
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