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Continued receipt and processing of these malformed packets will repeatedly crash the PPMD process and sustain the Denial of Service (DoS) condition. Due to the nature of the specifically crafted packet, exploitation of this issue requires direct, adjacent connectivity to the vulnerable component. This issue affects Juniper Networks Junos OS: 17.3 versions prior to 17.3R3-S11; 17.4 versions prior to 17.4R2-S12, 17.4R3-S4; 18.1 versions prior to 18.1R3-S12; 18.2 versions prior to 18.2R2-S8, 18.2R3-S7; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R1-S8, 18.4R2-S7, 18.4R3-S6; 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3-S4; 19.2 versions prior to 19.2R1-S5, 19.2R3-S1; 19.3 versions prior to 19.3R2-S5, 19.3R3-S1; 19.4 versions prior to 19.4R2-S2, 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R1-S2, 20.2R2."}, {"lang": "es", "value": "Una vulnerabilidad en el demonio de administraci\u00f3n peri\u00f3dica de paquetes (PPMD) distribuido o centralizado de Juniper Networks Junos OS, puede causar que la recepci\u00f3n de un paquete malformado se bloquee y reinicie el proceso PPMD, conllevando a la desestabilizaci\u00f3n de la red, la interrupci\u00f3n del servicio y una condici\u00f3n de Denegaci\u00f3n de Servicio (DoS) .&#xa0;La recepci\u00f3n y el procesamiento continuo de estos paquetes malformados bloquear\u00e1n repetidamente el proceso PPMD ??y mantendr\u00e1n la condici\u00f3n de Denegaci\u00f3n de servicio (DoS).&#xa0;Debido a la naturaleza del paquete dise\u00f1ado espec\u00edficamente, la explotaci\u00f3n de este problema requiere conectividad directa y adyacente al componente vulnerable.&#xa0;Este problema afecta a Juniper Networks Junos OS: versiones 17.3 anteriores a 17.3R3-S11;&#xa0;versiones 17.4 anteriores a 17.4R2-S12, 17.4R3-S4;&#xa0;versiones 18.1 anteriores a 18.1R3-S12;&#xa0;versiones 18.2 anteriores a 18.2R2-S8, 18.2R3-S7;&#xa0;versiones 18.3 anteriores a 18.3R3-S4;&#xa0;versiones 18.&#xa0;4 anteriores a 18.4R1-S8, 18.4R2-S7, 18.4R3-S6;&#xa0;versiones 19.1 anteriores a 19.1R1-S6, 19.1R2-S2, 19.1R3-S4;&#xa0;versiones19.2 anteriores a 19.2R1-S5, 19.2R3-S1;&#xa0;versiones 19.3 anteriores a 19.3R2-S5, 19.3R3-S1;&#xa0;versiones 19.4 anteriores a 19.4R2-S2, 19.4R3;&#xa0;versiones 20.1 anteriores a 20.1R2;&#xa0;versiones 20.2 anteriores a 20.2R1-S2, 20.2R2."}], "id": "CVE-2021-0214", "lastModified": "2021-04-28T22:42:04.727", "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": "2021-04-22T20:15:08.353", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11117"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-20"}], "source": "sirt@juniper.net", "type": "Secondary"}]}

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