CVE-2021-27393

{"containers": {"cna": {"affected": [{"product": "Nucleus NET", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions"}]}, {"product": "Nucleus ReadyStart V3", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V2013.08"}]}, {"product": "Nucleus Source Code", "vendor": "Siemens", "versions": [{"status": "affected", "version": "Versions including affected DNS modules"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability has been identified in Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2013.08), Nucleus Source Code (Versions including affected DNS modules). The DNS client does not properly randomize UDP port numbers of DNS requests. That could allow an attacker to poison the DNS cache or spoof DNS resolving."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-330", "description": "CWE-330: Use of Insufficiently Random Values", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2022-01-11T11:27:04.000Z", "orgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77", "shortName": "siemens"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-201384.pdf"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "productcert@siemens.com", "ID": "CVE-2021-27393", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Nucleus NET", "version": {"version_data": [{"version_value": "All versions"}]}}, {"product_name": "Nucleus ReadyStart V3", "version": {"version_data": [{"version_value": "All versions < V2013.08"}]}}, {"product_name": "Nucleus Source Code", "version": {"version_data": [{"version_value": "Versions including affected DNS modules"}]}}]}, "vendor_name": "Siemens"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A vulnerability has been identified in Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2013.08), Nucleus Source Code (Versions including affected DNS modules). The DNS client does not properly randomize UDP port numbers of DNS requests. That could allow an attacker to poison the DNS cache or spoof DNS resolving."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-330: Use of Insufficiently Random Values"}]}]}, "references": {"reference_data": [{"name": "https://cert-portal.siemens.com/productcert/pdf/ssa-201384.pdf", "refsource": "MISC", "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-201384.pdf"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T20:48:16.739Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-201384.pdf"}]}]}, "cveMetadata": {"assignerOrgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77", "assignerShortName": "siemens", "cveId": "CVE-2021-27393", "datePublished": "2021-04-22T20:42:21.000Z", "dateReserved": "2021-02-18T00:00:00.000Z", "dateUpdated": "2024-08-03T20:48:16.739Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "Nucleus NET", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions"}]}, {"product": "Nucleus ReadyStart V3", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V2013.08"}]}, {"product": "Nucleus Source Code", "vendor": "Siemens", "versions": [{"status": "affected", "version": "Versions including affected DNS modules"}]}], "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": "68638787-E37D-483F-8E83-51C9A52ECC8D", "versionEndExcluding": "2013.08", "vulnerable": true}, {"criteria": "cpe:2.3:a:siemens:nucleus_source_code:-:*:*:*:*:*:*:*", "matchCriteriaId": "53A38C64-612A-4BC5-83D5-D3FA1C90E0F7", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability has been identified in Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2013.08), Nucleus Source Code (Versions including affected DNS modules). The DNS client does not properly randomize UDP port numbers of DNS requests. That could allow an attacker to poison the DNS cache or spoof DNS resolving."}, {"lang": "es", "value": "Se ha identificado una vulnerabilidad en Nucleus NET (Todas las versiones), Nucleus ReadyStart V3 (Todas las versiones anteriores a V2013.08), Nucleus Source Code (Versiones que incluyen los m\u00f3dulos DNS afectados). El cliente DNS no aleatoriza correctamente los n\u00fameros de puerto UDP de las peticiones DNS. Esto podr\u00eda permitir a un atacante envenenar la cach\u00e9 DNS o falsificar la resoluci\u00f3n DNS."}], "id": "CVE-2021-27393", "lastModified": "2026-06-17T03:44:46.630", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "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": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-04-22T21:15:10.393", "references": [{"source": "productcert@siemens.com", "tags": ["Vendor Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-201384.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-201384.pdf"}], "sourceIdentifier": "productcert@siemens.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-330"}], "source": "productcert@siemens.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-330"}], "source": "nvd@nist.gov", "type": "Secondary"}]}

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