CVE-2021-37186

{"containers": {"cna": {"affected": [{"product": "LOGO! CMR2020", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V2.2"}]}, {"product": "LOGO! CMR2040", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V2.2"}]}, {"product": "SIMATIC RTU3010C", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V4.0.9"}]}, {"product": "SIMATIC RTU3030C", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V4.0.9"}]}, {"product": "SIMATIC RTU3031C", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V4.0.9"}]}, {"product": "SIMATIC RTU3041C", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V4.0.9"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability has been identified in LOGO! CMR2020 (All versions < V2.2), LOGO! CMR2040 (All versions < V2.2), SIMATIC RTU3010C (All versions < V4.0.9), SIMATIC RTU3030C (All versions < V4.0.9), SIMATIC RTU3031C (All versions < V4.0.9), SIMATIC RTU3041C (All versions < V4.0.9). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-330", "description": "CWE-330: Use of Insufficiently Random Values", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2022-02-09T15:16:46.000Z", "orgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77", "shortName": "siemens"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "productcert@siemens.com", "ID": "CVE-2021-37186", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "LOGO! CMR2020", "version": {"version_data": [{"version_value": "All versions < V2.2"}]}}, {"product_name": "LOGO! CMR2040", "version": {"version_data": [{"version_value": "All versions < V2.2"}]}}, {"product_name": "SIMATIC RTU3010C", "version": {"version_data": [{"version_value": "All versions < V4.0.9"}]}}, {"product_name": "SIMATIC RTU3030C", "version": {"version_data": [{"version_value": "All versions < V4.0.9"}]}}, {"product_name": "SIMATIC RTU3031C", "version": {"version_data": [{"version_value": "All versions < V4.0.9"}]}}, {"product_name": "SIMATIC RTU3041C", "version": {"version_data": [{"version_value": "All versions < V4.0.9"}]}}]}, "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 LOGO! CMR2020 (All versions < V2.2), LOGO! CMR2040 (All versions < V2.2), SIMATIC RTU3010C (All versions < V4.0.9), SIMATIC RTU3030C (All versions < V4.0.9), SIMATIC RTU3031C (All versions < V4.0.9), SIMATIC RTU3041C (All versions < V4.0.9). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information."}]}, "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-316383.pdf", "refsource": "MISC", "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T01:16:03.873Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf"}]}]}, "cveMetadata": {"assignerOrgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77", "assignerShortName": "siemens", "cveId": "CVE-2021-37186", "datePublished": "2021-09-14T10:47:49.000Z", "dateReserved": "2021-07-21T00:00:00.000Z", "dateUpdated": "2024-08-04T01:16:03.873Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"affected": [{"affectedData": [{"product": "LOGO! CMR2020", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V2.2"}]}, {"product": "LOGO! CMR2040", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V2.2"}]}, {"product": "SIMATIC RTU3010C", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V4.0.9"}]}, {"product": "SIMATIC RTU3030C", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V4.0.9"}]}, {"product": "SIMATIC RTU3031C", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V4.0.9"}]}, {"product": "SIMATIC RTU3041C", "vendor": "Siemens", "versions": [{"status": "affected", "version": "All versions < V4.0.9"}]}], "source": "productcert@siemens.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:siemens:logo\\!_cmr2020_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "FE9FB0B2-71ED-4208-B908-1C78CB15E372", "versionEndExcluding": "2.2", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:siemens:logo\\!_cmr2020:-:*:*:*:*:*:*:*", "matchCriteriaId": "E8E5F42B-63E3-4B2D-A03F-983F51EE0648", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:siemens:logo\\!_cmr2040_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "ECD83A4C-DB7F-425C-882C-0DC809AD4A21", "versionEndExcluding": "2.2", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:siemens:logo\\!_cmr2040:-:*:*:*:*:*:*:*", "matchCriteriaId": "6ED47A12-5637-40E2-BE39-B76B789C0DFD", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:siemens:simatic_rtu3010c_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "74470D59-9DA5-434A-893F-A3E2EC5E18F8", "versionEndExcluding": "4.0.9", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:siemens:simatic_rtu3010c:*:*:*:*:*:*:*:*", "matchCriteriaId": "3279084C-DCED-41B0-BCA1-684877FB66CC", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:siemens:simatic_rtu3030c_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "0761C6A3-BDE5-4009-9EEA-B86770636267", "versionEndExcluding": "4.0.9", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:siemens:simatic_rtu3030c:*:*:*:*:*:*:*:*", "matchCriteriaId": "C36A82A5-9E25-4166-9A26-2172DEEE3F34", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:siemens:simatic_rtu3031c_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "2DF2794C-D474-41AA-BF54-53B52F446F13", "versionEndExcluding": "4.0.9", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:siemens:simatic_rtu3031c:*:*:*:*:*:*:*:*", "matchCriteriaId": "11CF1847-8D15-44C3-8D90-2172C09DE8C2", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:siemens:simatic_rtu3041c_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "74F400D8-9118-41FC-AAF5-D945EE62FF67", "versionEndExcluding": "4.0.9", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:siemens:simatic_rtu3041c:*:*:*:*:*:*:*:*", "matchCriteriaId": "E493A416-E988-4697-81B3-B0AA27531F13", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability has been identified in LOGO! CMR2020 (All versions < V2.2), LOGO! CMR2040 (All versions < V2.2), SIMATIC RTU3010C (All versions < V4.0.9), SIMATIC RTU3030C (All versions < V4.0.9), SIMATIC RTU3031C (All versions < V4.0.9), SIMATIC RTU3041C (All versions < V4.0.9). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information."}, {"lang": "es", "value": "Se ha identificado una vulnerabilidad en LOGO! CMR2020 (Todas las versiones anteriores a la versi\u00f3n V2.2), LOGO! CMR2040 (Todas las versiones anteriores a la versi\u00f3n V2.2), SIMATIC RTU3010C (Todas las versiones anteriores a la versi\u00f3n V4.0.9), SIMATIC RTU3030C (Todas las versiones anteriores a la versi\u00f3n V4.0.9), SIMATIC RTU3031C (Todas las versiones anteriores a la versi\u00f3n V4.0.9), SIMATIC RTU3041C (Todas las versiones anteriores a la versi\u00f3n V4.0.9). La pila TCP/IP subyacente no calcula apropiadamente los n\u00fameros aleatorios usados como ISN (Initial Sequence Numbers). Un atacante adyacente con acceso a la red de la interfaz LAN podr\u00eda interferir en el tr\u00e1fico, falsear la conexi\u00f3n y conseguir acceso a informaci\u00f3n confidencial"}], "id": "CVE-2021-37186", "lastModified": "2026-06-17T04:00:13.147", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "ADJACENT_NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:A/AC:L/Au:N/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 6.5, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-09-14T11:15:25.850", "references": [{"source": "productcert@siemens.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-316383.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": "Primary"}]}

{}

{}