CVE-2020-35684

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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:a:hcc-embedded:nichestack:3.0:*:*:*:*:*:*:*", "matchCriteriaId": "22916BA2-C530-46C0-9C4E-1C0342C9089E", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:siemens:sentron_3wl_com35_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "438332F0-E222-48FB-BA95-0A79EAC9E448", "versionEndExcluding": "1.2.0", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:siemens:sentron_3wl_com35:-:*:*:*:*:*:*:*", "matchCriteriaId": "AF6988F4-8734-4B27-AD0B-B91F25654F9A", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:siemens:sentron_3wa_com190_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "B62056DC-DF99-4118-9B22-45E51980CD7F", "versionEndExcluding": "2.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:siemens:sentron_3wa_com190:-:*:*:*:*:*:*:*", "matchCriteriaId": "797EAA6F-5E8C-4855-87ED-CE4D76D02571", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in HCC Nichestack 3.0. The code that parses TCP packets relies on an unchecked value of the IP payload size (extracted from the IP header) to compute the length of the TCP payload within the TCP checksum computation function. When the IP payload size is set to be smaller than the size of the IP header, the TCP checksum computation function may read out of bounds (a low-impact write-out-of-bounds is also possible)."}, {"lang": "es", "value": "Se ha detectado un problema en HCC Nichestack versi\u00f3n 3.0. El c\u00f3digo que analiza los paquetes TCP se basa en un valor no comprobado del tama\u00f1o de la carga \u00fatil IP (extra\u00eddo del encabezado IP) para calcular la longitud de la carga \u00fatil TCP dentro de la funci\u00f3n de c\u00e1lculo de la suma de comprobaci\u00f3n TCP. Cuando el tama\u00f1o de la carga \u00fatil IP est\u00e1 configurado para ser menor que el tama\u00f1o del encabezado IP, la funci\u00f3n de c\u00e1lculo de la suma de comprobaci\u00f3n TCP puede leer fuera de l\u00edmites (tambi\u00e9n es posible una escritura fuera de l\u00edmites de bajo impacto)."}], "id": "CVE-2020-35684", "lastModified": "2026-06-17T03:14:07.667", "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": "2021-08-19T12:15:08.020", "references": [{"source": "cve@mitre.org", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf"}, {"source": "cve@mitre.org", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/"}, {"source": "cve@mitre.org", "tags": ["Product"], "url": "https://www.hcc-embedded.com"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.kb.cert.org/vuls/id/608209"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mitigation", "Third Party Advisory"], "url": "https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Product"], "url": "https://www.hcc-embedded.com"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.kb.cert.org/vuls/id/608209"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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