{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-03T19:06:02.342","vulnerabilities":[{"cve":{"id":"CVE-2020-27737","sourceIdentifier":"productcert@siemens.com","published":"2021-04-22T21:15:09.280","lastModified":"2024-11-21T05:21:43.447","vulnStatus":"Modified","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 response parsing functionality does not properly validate various length and counts of the records. 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 memory past the allocated structure."},{"lang":"es","value":"Se ha identificado una vulnerabilidad en Nucleus NET (Todas las versiones), Nucleus ReadyStart V3 (Todas las versiones anteriores a la versión V2017.02.3), Nucleus ReadyStart V4 (Todas las versiones anteriores a la versión V4.1.0), Nucleus Source Code (Versiones que incluyen los módulos DNS afectados), SIMOTICS CONNECT 400 (Todas las versiones anteriores a la versión V0.5.0.0). La funcionalidad de análisis de la respuesta DNS no valida correctamente varias longitudes y recuentos de los registros. El análisis sintáctico de respuestas malformadas podría dar lugar a una lectura más allá del final de una estructura asignada. Un atacante con una posición privilegiada en la red podría aprovechar esta vulnerabilidad para causar una condición de denegación de servicio o filtrar la memoria más allá de la estructura asignada"}],"metrics":{"cvssMetricV31":[{"source":"productcert@siemens.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":4.2},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":4.2}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:P/I:N/A:P","baseScore":5.8,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":8.6,"impactScore":4.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"productcert@siemens.com","type":"Secondary","description":[{"lang":"en","value":"CWE-125"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-125"}]}],"configurations":[{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:siemens:simotics_connect_400_firmware:*:*:*:*:*:*:*:*","versionEndExcluding":"0.5.0.0","matchCriteriaId":"F02FDCB9-0149-4EFA-9DBA-045C4AD84EC0"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:h:siemens:simotics_connect_400:-:*:*:*:*:*:*:*","matchCriteriaId":"48BFF9EF-D1C1-4107-8D1E-51315C03FFF0"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"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:*:*:*:*:*:*:*:*","versionEndExcluding":"2017.02.3","matchCriteriaId":"EC33F30E-EEA1-452E-8EFE-28ADA88E3F56"},{"vulnerable":true,"criteria":"cpe:2.3:a:siemens:nucleus_readystart_v4:*:*:*:*:*:*:*:*","versionEndExcluding":"4.1.0","matchCriteriaId":"B35FDE44-BE25-431D-B2EE-195ACC5A606C"},{"vulnerable":true,"criteria":"cpe:2.3:a:siemens:nucleus_source_code:-:*:*:*:*:*:*:*","matchCriteriaId":"53A38C64-612A-4BC5-83D5-D3FA1C90E0F7"}]}]}],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf","source":"productcert@siemens.com"},{"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":"productcert@siemens.com","tags":["Patch","Vendor Advisory"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf","source":"af854a3a-2127-422b-91ae-364da2661108"},{"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","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Vendor Advisory"]}]}}]}