CVE & CISA-KEV Catalog

CVE-2020-7543

HIGH
7.5
CVSS v3
NVD

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.

CWE-754

How to fix

Remediation Available
modicon m340 bmxp341000 firmwareNVD
Affected:< 3.30Fixed in:3.30CVE-2020-7543derived from NVD
modicon m340 bmxp342000 firmwareNVD
Affected:< 3.30Fixed in:3.30CVE-2020-7543derived from NVD
modicon m340 bmxp3420102 firmwareNVD
Affected:< 3.30Fixed in:3.30CVE-2020-7543derived from NVD
modicon m340 bmxp3420102cl firmwareNVD
Affected:< 3.30Fixed in:3.30CVE-2020-7543derived from NVD
modicon m340 bmxp342020 firmwareNVD
Affected:< 3.30Fixed in:3.30CVE-2020-7543derived from NVD
modicon m340 bmxp3420302 firmwareNVD
Affected:< 3.30Fixed in:3.30CVE-2020-7543derived from NVD
modicon m340 bmxp3420302cl firmwareNVD
Affected:< 3.30Fixed in:3.30CVE-2020-7543derived from NVD
modicon m580 bmep581020 firmwareNVD
Affected:< 3.20Fixed in:3.20CVE-2020-7543derived from NVD
modicon m580 bmep582020 firmwareNVD
Affected:< 3.20Fixed in:3.20CVE-2020-7543derived from NVD
modicon m580 bmep582040 firmwareNVD
Affected:< 3.20Fixed in:3.20CVE-2020-7543derived from NVD
modicon m580 bmep583020 firmwareNVD
Affected:< 3.20Fixed in:3.20CVE-2020-7543derived from NVD
modicon m580 bmep583040 firmwareNVD
Affected:< 3.20Fixed in:3.20CVE-2020-7543derived from NVD
modicon m580 bmep584020 firmwareNVD
Affected:< 3.20Fixed in:3.20CVE-2020-7543derived from NVD
modicon m580 bmep584040 firmwareNVD
Affected:< 3.20Fixed in:3.20CVE-2020-7543derived from NVD
modicon m580 bmep585040 firmwareNVD
Affected:< 3.20Fixed in:3.20CVE-2020-7543derived from NVD
modicon m580 bmep586040 firmwareNVD
Affected:< 3.20Fixed in:3.20CVE-2020-7543derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

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

Exploit Intelligence

1.31%probability of exploitation in 30 days
67thpercentile

Moderate risk: more likely to be exploited than 67% of all known CVEs.

References

Vendor Advisory1
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CVE-2020-7543 severity badge

Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.