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CVE-2020-7542

HIGHCVSS 7.5/10EPSS 1.31%

Last modified

CVE-2020-7542 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.31% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
1.31%

67.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Schneider-ElectricModicon M580 Bmep584040 Firmware< 3.20
Schneider-ElectricModicon M580 Bmep582040 Firmware< 3.20
Schneider-ElectricModicon M580 Bmep586040 Firmware< 3.20
Schneider-ElectricModicon M580 Bmep585040 Firmware< 3.20
Schneider-ElectricModicon M580 Bmep582020 Firmware< 3.20
Schneider-ElectricModicon M580 Bmep581020 Firmware< 3.20
Schneider-ElectricModicon M580 Bmep584020 Firmware< 3.20
Schneider-ElectricModicon M580 Bmep583040 Firmware< 3.20
Schneider-ElectricModicon M580 Bmep583020 Firmware< 3.20
Schneider-ElectricModicon M340 Bmxp341000 Firmware< 3.30
Schneider-ElectricModicon M340 Bmxp342000 Firmware< 3.30
Schneider-ElectricModicon M340 Bmxp3420102 Firmware< 3.30
Schneider-ElectricModicon M340 Bmxp3420102cl Firmware< 3.30
Schneider-ElectricModicon M340 Bmxp342020 Firmware< 3.30
Schneider-ElectricModicon M340 Bmxp3420302 Firmware< 3.30
Schneider-ElectricModicon M340 Bmxp3420302cl Firmware< 3.30
Schneider-ElectricTsxp574634 FirmwareAll versions
Schneider-ElectricTsxp575634 FirmwareAll versions
Schneider-ElectricTsxp576634 FirmwareAll versions
Schneider-Electric140cpu65150 FirmwareAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-7542?
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.
How severe is CVE-2020-7542?
CVE-2020-7542 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.31% probability of exploitation in the next 30 days.
How do I fix CVE-2020-7542?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-7542?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST