CVE-2018-20818

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:openplcproject:openplc_v2_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "A9D03A78-0590-471D-8C3A-A620F0C46649", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:openplcproject:openplc_v2:-:*:*:*:*:*:*:*", "matchCriteriaId": "6100B866-B033-4EAA-8172-41C165424238", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:openplcproject:openplc_v3_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "7624BE59-886B-421D-96CC-105F185AE070", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:openplcproject:openplc_v3:-:*:*:*:*:*:*:*", "matchCriteriaId": "6861E863-E6AC-4BFB-8CDE-2328A045540D", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A buffer overflow vulnerability was discovered in the OpenPLC controller, in the OpenPLC_v2 and OpenPLC_v3 versions. It occurs in the modbus.cpp mapUnusedIO() function, which can cause a runtime crash of the PLC or possibly have unspecified other impact."}, {"lang": "es", "value": "Fue encontrada una vulnerabilidad de desbordamiento de b\u00fafer en el controlador OpenPLC, en las versiones OpenPLC_v2 y OpenPLC_v3. Se produce en la funci\u00f3n de mapUnusedIO() Modbus.cpp, que puede provocar un bloqueo en tiempo de ejecuci\u00f3n del PLC o, posiblemente, tener otro impacto no especificado."}], "id": "CVE-2018-20818", "lastModified": "2026-06-17T01:53:32.400", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-04-22T11:29:01.970", "references": [{"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://arxiv.org/pdf/1809.07477"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://arxiv.org/pdf/1809.07477"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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