CVE-2021-20596

{"containers": {"cna": {"affected": [{"product": "MELSEC-F Series FX3U-ENET; FX3U-ENET-L; FX3U-ENET-P502", "vendor": "n/a", "versions": [{"status": "affected", "version": "Firmware version 1.14 and prior"}]}], "descriptions": [{"lang": "en", "value": "NULL Pointer Dereference in MELSEC-F Series FX3U-ENET firmware version 1.14 and prior, FX3U-ENET-L firmware version 1.14 and prior and FX3U-ENET-P502 firmware version 1.14 and prior allows a remote unauthenticated attacker to cause a DoS condition in communication by sending specially crafted packets. Control by MELSEC-F series PLC is not affected and system reset is required for recovery."}], "problemTypes": [{"descriptions": [{"description": "NULL Pointer Dereference", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-07-30T20:02:26.000Z", "orgId": "e0f77b61-78fd-4786-b3fb-1ee347a748ad", "shortName": "Mitsubishi"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-006_en.pdf"}, {"tags": ["x_refsource_MISC"], "url": "https://jvn.jp/vu/JVNVU94348759/index.html"}, {"tags": ["x_refsource_MISC"], "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-201-01"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp", "ID": "CVE-2021-20596", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "MELSEC-F Series FX3U-ENET; FX3U-ENET-L; FX3U-ENET-P502", "version": {"version_data": [{"version_value": "Firmware version 1.14 and prior"}, {"version_value": "Firmware version 1.14 and prior"}, {"version_value": "Firmware version 1.14 and prior"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "NULL Pointer Dereference in MELSEC-F Series FX3U-ENET firmware version 1.14 and prior, FX3U-ENET-L firmware version 1.14 and prior and FX3U-ENET-P502 firmware version 1.14 and prior allows a remote unauthenticated attacker to cause a DoS condition in communication by sending specially crafted packets. Control by MELSEC-F series PLC is not affected and system reset is required for recovery."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "NULL Pointer Dereference"}]}]}, "references": {"reference_data": [{"name": "https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-006_en.pdf", "refsource": "MISC", "url": "https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-006_en.pdf"}, {"name": "https://jvn.jp/vu/JVNVU94348759/index.html", "refsource": "MISC", "url": "https://jvn.jp/vu/JVNVU94348759/index.html"}, {"name": "https://us-cert.cisa.gov/ics/advisories/icsa-21-201-01", "refsource": "MISC", "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-201-01"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T17:45:44.834Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-006_en.pdf"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://jvn.jp/vu/JVNVU94348759/index.html"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-201-01"}]}]}, "cveMetadata": {"assignerOrgId": "e0f77b61-78fd-4786-b3fb-1ee347a748ad", "assignerShortName": "Mitsubishi", "cveId": "CVE-2021-20596", "datePublished": "2021-07-22T11:02:56.000Z", "dateReserved": "2020-12-17T00:00:00.000Z", "dateUpdated": "2024-08-03T17:45:44.834Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "MELSEC-F Series FX3U-ENET; FX3U-ENET-L; FX3U-ENET-P502", "vendor": "n/a", "versions": [{"status": "affected", "version": "Firmware version 1.14 and prior"}]}], "source": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:mitsubishielectric:fx3u-enet-l_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "C54E1F47-E0A3-4C49-A219-84175C7B8108", "versionEndIncluding": "1.14", "vulnerable": true}, {"criteria": "cpe:2.3:o:mitsubishielectric:fx3u-enet-p502_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "72D73FF4-10B4-4F70-B603-27775A21B9F1", "versionEndIncluding": "1.14", "vulnerable": true}, {"criteria": "cpe:2.3:o:mitsubishielectric:fx3u-enet_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "BF1D75C8-9E0A-4A2A-A9B6-3A944721DFC4", "versionEndIncluding": "1.14", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "NULL Pointer Dereference in MELSEC-F Series FX3U-ENET firmware version 1.14 and prior, FX3U-ENET-L firmware version 1.14 and prior and FX3U-ENET-P502 firmware version 1.14 and prior allows a remote unauthenticated attacker to cause a DoS condition in communication by sending specially crafted packets. Control by MELSEC-F series PLC is not affected and system reset is required for recovery."}, {"lang": "es", "value": "Una desreferencia de puntero NULL en MELSEC-F Series FX3U-ENET versiones de firmware 1.14 y anteriores, FX3U-ENET-L versiones de firmware 1.14 y anteriores, y FX3U-ENET-P502 versiones de firmware 1.14 y anteriores, permite a un atacante remoto no autenticado causar una condici\u00f3n de Denegaci\u00f3n de Servicio en la comunicaci\u00f3n mediante el env\u00edo de paquetes especialmente dise\u00f1ados. El control por parte del PLC de la serie MELSEC-F no est\u00e1 afectado y es requerido un reinicio del sistema para la recuperaci\u00f3n"}], "id": "CVE-2021-20596", "lastModified": "2026-06-17T03:34:05.433", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-07-22T12:15:07.787", "references": [{"source": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp", "tags": ["Patch", "Third Party Advisory"], "url": "https://jvn.jp/vu/JVNVU94348759/index.html"}, {"source": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp", "tags": ["Third Party Advisory"], "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-201-01"}, {"source": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp", "tags": ["Patch", "Vendor Advisory"], "url": "https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-006_en.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://jvn.jp/vu/JVNVU94348759/index.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-201-01"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-006_en.pdf"}], "sourceIdentifier": "Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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