CVE-2020-27736

{"containers": {"cna": {"providerMetadata": {"orgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77", "shortName": "siemens", "dateUpdated": "2023-08-08T09:20:03.377Z"}, "descriptions": [{"lang": "en", "value": "A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.20), APOGEE PXC Modular (BACnet) (All versions < V3.5.5), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.20), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.3), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (Versions including affected DNS modules), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). The DNS domain name label parsing functionality does not properly validate the null-terminated name in DNS-responses. The parsing of malformed responses could result in a read past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to cause a denial-of-service condition or leak the read memory."}], "affected": [{"vendor": "Siemens", "product": "APOGEE PXC Compact (BACnet)", "versions": [{"version": "All versions < V3.5.5", "status": "affected"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "APOGEE PXC Compact (P2 Ethernet)", "versions": [{"version": "All versions < V2.8.20", "status": "affected"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "APOGEE PXC Modular (BACnet)", "versions": [{"version": "All versions < V3.5.5", "status": "affected"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "APOGEE PXC Modular (P2 Ethernet)", "versions": [{"version": "All versions < V2.8.20", "status": "affected"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "Nucleus NET", "versions": [{"version": "All versions", "status": "affected"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "Nucleus ReadyStart V3", "versions": [{"version": "All versions < V2017.02.3", "status": "affected"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "Nucleus ReadyStart V4", "versions": [{"version": "All versions < V4.1.0", "status": "affected"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "Nucleus Source Code", "versions": [{"version": "Versions including affected DNS modules", "status": "affected"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMOTICS CONNECT 400", "versions": [{"version": "All versions < V0.5.0.0", "status": "affected"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "TALON TC Compact (BACnet)", "versions": [{"version": "All versions < V3.5.5", "status": "affected"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "TALON TC Modular (BACnet)", "versions": [{"version": "All versions < V3.5.5", "status": "affected"}], "defaultStatus": "unknown"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H/E:P/RL:O/RC:C", "baseScore": 6.5, "baseSeverity": "MEDIUM"}}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-170", "description": "CWE-170: Improper Null Termination", "type": "CWE"}]}], "references": [{"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-705111.pdf"}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-669158.pdf"}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf"}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T16:18:45.573Z"}, "title": "CVE Program Container", "references": [{"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-705111.pdf", "tags": ["x_transferred"]}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-669158.pdf", "tags": ["x_transferred"]}, {"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf", "tags": ["x_transferred"]}]}]}, "cveMetadata": {"assignerOrgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77", "assignerShortName": "siemens", "cveId": "CVE-2020-27736", "datePublished": "2021-04-22T20:42:19.000Z", "dateReserved": "2020-10-26T00:00:00.000Z", "dateUpdated": "2024-08-04T16:18:45.573Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"defaultStatus": "unknown", "product": "APOGEE PXC Compact (BACnet)", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V3.5.5"}]}, {"defaultStatus": "unknown", "product": "APOGEE PXC Compact (P2 Ethernet)", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V2.8.20"}]}, {"defaultStatus": "unknown", "product": "APOGEE PXC Modular (BACnet)", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V3.5.5"}]}, {"defaultStatus": "unknown", "product": "APOGEE PXC Modular (P2 Ethernet)", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V2.8.20"}]}, {"defaultStatus": "unknown", "product": "Nucleus NET", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions"}]}, {"defaultStatus": "unknown", "product": "Nucleus ReadyStart V3", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V2017.02.3"}]}, {"defaultStatus": "unknown", "product": "Nucleus ReadyStart V4", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V4.1.0"}]}, {"defaultStatus": "unknown", "product": "Nucleus Source Code", "vendor": "Siemens", "versions": [{"status": "affected", "version": "Versions including affected DNS modules"}]}, {"defaultStatus": "unknown", "product": "SIMOTICS CONNECT 400", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V0.5.0.0"}]}, {"defaultStatus": "unknown", "product": "TALON TC Compact (BACnet)", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V3.5.5"}]}, {"defaultStatus": "unknown", "product": "TALON TC Modular (BACnet)", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V3.5.5"}]}], "source": "productcert@siemens.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:*", "matchCriteriaId": "7A987CFB-4A41-4F82-8C7F-31DE8F0650DE", "vulnerable": true}, {"criteria": "cpe:2.3:a:siemens:nucleus_readystart_v3:*:*:*:*:*:*:*:*", "matchCriteriaId": "EC33F30E-EEA1-452E-8EFE-28ADA88E3F56", "versionEndExcluding": "2017.02.3", "vulnerable": true}, {"criteria": "cpe:2.3:a:siemens:nucleus_readystart_v4:*:*:*:*:*:*:*:*", "matchCriteriaId": "B35FDE44-BE25-431D-B2EE-195ACC5A606C", "versionEndExcluding": "4.1.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:siemens:nucleus_source_code:-:*:*:*:*:*:*:*", "matchCriteriaId": "53A38C64-612A-4BC5-83D5-D3FA1C90E0F7", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:siemens:simotics_connect_400_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "F02FDCB9-0149-4EFA-9DBA-045C4AD84EC0", "versionEndExcluding": "0.5.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:siemens:simotics_connect_400:-:*:*:*:*:*:*:*", "matchCriteriaId": "48BFF9EF-D1C1-4107-8D1E-51315C03FFF0", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.20), APOGEE PXC Modular (BACnet) (All versions < V3.5.5), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.20), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.3), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (Versions including affected DNS modules), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). The DNS domain name label parsing functionality does not properly validate the null-terminated name in DNS-responses. The parsing of malformed responses could result in a read past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to cause a denial-of-service condition or leak the read memory."}, {"lang": "es", "value": "Se ha identificado una vulnerabilidad en Nucleus NET (Todas las versiones), Nucleus ReadyStart V3 (Todas las versiones anteriores a V2017.02.3), Nucleus ReadyStart V4 (Todas las versiones anteriores a V4.1.0), Nucleus Source Code (Versiones que incluyen los m\u00f3dulos DNS afectados), SIMOTICS CONNECT 400 (Todas las versiones anteriores a V0.5.0.0). La funcionalidad de an\u00e1lisis de etiquetas de nombres de dominio DNS no valida correctamente los nombres terminados en cero en las respuestas DNS. El an\u00e1lisis sint\u00e1ctico de las respuestas malformadas podr\u00eda dar lugar a una lectura m\u00e1s all\u00e1 del final de una estructura asignada. Un atacante con una posici\u00f3n privilegiada en la red podr\u00eda aprovechar esta vulnerabilidad para provocar una condici\u00f3n de denegaci\u00f3n de servicio o filtrar la memoria de lectura"}], "id": "CVE-2020-27736", "lastModified": "2026-06-17T03:09:32.680", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 4.2, "source": "productcert@siemens.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 4.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-04-22T21:15:09.250", "references": [{"source": "productcert@siemens.com", "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf"}, {"source": "productcert@siemens.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-669158.pdf"}, {"source": "productcert@siemens.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-705111.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-669158.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-705111.pdf"}], "sourceIdentifier": "productcert@siemens.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-170"}], "source": "productcert@siemens.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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