{"containers": {"cna": {"affected": [{"platforms": ["EX4300 series"], "product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"lessThan": "17.3R3-S9", "status": "affected", "version": "17.3", "versionType": "custom"}, {"lessThan": "17.4R2-S11, 17.4R3-S2", "status": "affected", "version": "17.4", "versionType": "custom"}, {"lessThan": "18.1R3-S10", "status": "affected", "version": "18.1", "versionType": "custom"}, {"lessThan": "18.2R3-S4", "status": "affected", "version": "18.2", "versionType": "custom"}, {"lessThan": "18.3R2-S4, 18.3R3-S2", "status": "affected", "version": "18.3", "versionType": "custom"}, {"lessThan": "18.4R2-S4, 18.4R3-S2", "status": "affected", "version": "18.4", "versionType": "custom"}, {"lessThan": "19.1R2-S2, 19.1R3-S1", "status": "affected", "version": "19.1", "versionType": "custom"}, {"lessThan": "19.2R1-S5, 19.2R2-S1, 19.2R3", "status": "affected", "version": "19.2", "versionType": "custom"}, {"lessThan": "19.3R2-S4, 19.3R3", "status": "affected", "version": "19.3", "versionType": "custom"}, {"lessThan": "19.4R1-S3, 19.4R2", "status": "affected", "version": "19.4", "versionType": "custom"}, {"lessThan": "20.1R1-S3, 20.1R2", "status": "affected", "version": "20.1", "versionType": "custom"}]}], "configurations": [{"lang": "en", "value": "The example of the configuration stanza affected by this issue is as follows:\n [interfaces irb unit <UNIT_NUMBER>]"}], "datePublic": "2020-10-14T00:00:00", "descriptions": [{"lang": "en", "value": "On Juniper Networks EX4300 Series, receipt of a stream of specific IPv4 packets can cause Routing Engine (RE) high CPU load, which could lead to network protocol operation issue and traffic interruption. This specific packets can originate only from within the broadcast domain where the device is connected. This issue occurs when the packets enter to the IRB interface. Only IPv4 packets can trigger this issue. IPv6 packets cannot trigger this issue. 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This specific packets can originate only from within the broadcast domain where the device is connected. This issue occurs when the packets enter to the IRB interface. Only IPv4 packets can trigger this issue. IPv6 packets cannot trigger this issue. This issue affects Juniper Networks Junos OS on EX4300 series: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2; 18.1 versions prior to 18.1R3-S10; 18.2 versions prior to 18.2R3-S4; 18.3 versions prior to 18.3R2-S4, 18.3R3-S2; 18.4 versions prior to 18.4R2-S4, 18.4R3-S2; 19.1 versions prior to 19.1R2-S2, 19.1R3-S1; 19.2 versions prior to 19.2R1-S5, 19.2R2-S1, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2; 20.1 versions prior to 20.1R1-S3, 20.1R2."}, {"lang": "es", "value": "En Juniper Networks EX4300 Series, la recepci\u00f3n de un flujo de paquetes IPv4 espec\u00edficos puede causar una alta carga de CPU del Routing Engine (RE), lo que podr\u00eda conllevar a problemas de funcionamiento del protocolo de red e interrupciones del tr\u00e1fico.&#xa0;Estos paquetes espec\u00edficos pueden originarse solo desde dentro del dominio de transmisi\u00f3n donde est\u00e1 conectado el dispositivo.&#xa0;Este problema ocurre cuando los paquetes ingresan a la interfaz IRB.&#xa0;Solo los paquetes IPv4 pueden desencadenar este problema.&#xa0;Los paquetes IPv6 no pueden desencadenar este problema.&#xa0;Este problema afecta a Juniper Networks Junos OS en EX4300 series: versiones 17.3 anteriores a 17.3R3-S9;&#xa0;versiones 17.4 anteriores a 17.4R2-S11, 17.4R3-S2;&#xa0;versiones 18.1 anteriores a 18.1R3-S10;&#xa0;versiones 18.2 anteriores a 18.2R3-S4;&#xa0;versiones 18.3 anteriores a 18.3R2-S4, 18.3R3-S2;&#xa0;versiones 18.4 anteriores a 18.4R2-S4, 18.4R3-S2;&#xa0;versiones 19.1 anteriores a 19.1R2-S2, 19.1R3-S1;&#xa0;versiones 19.2 anteriores a 19.2R1-S5, 19.2R2-S1, 19.2R3;&#xa0;versiones 19.&#xa0;3 anteriores a 19.3R2-S4, 19.3R3;&#xa0;versiones 19.4 anteriores a 19.4R1-S3, 19.4R2;&#xa0;versiones 20.1 anteriores a 20.1R1-S3, 20.1R2"}], "id": "CVE-2020-1670", "lastModified": "2022-01-01T17:35:25.310", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "ADJACENT_NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 3.3, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:A/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 6.5, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "sirt@juniper.net", "type": "Primary"}]}, "published": "2020-10-16T21:15:12.957", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/"}, {"source": "nvd@nist.gov", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11067&actp=SUBSCRIPTION"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-400"}], "source": "sirt@juniper.net", "type": "Secondary"}]}

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