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This issue affects Juniper Networks Junos OS: 17.2 versions prior to 17.2R3-S4; 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-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R2-S2, 19.1R3; 19.2 versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2. 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Continued receipt and processing of these transit packets will create a sustained Denial of Service (DoS) condition. This issue only occurs when TCPv6 packets are routed through the management interface. Other transit traffic, and traffic destined to the management interface, are unaffected by this vulnerability. This issue was introduced as part of a TCP Parallelization feature added in Junos OS 17.2, and affects systems with concurrent network stack enabled. This feature is enabled by default, but can be disabled (see WORKAROUND section below). This issue affects Juniper Networks Junos OS: 17.2 versions prior to 17.2R3-S4; 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-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R2-S2, 19.1R3; 19.2 versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2. This issue does not affect Juniper Networks Junos OS versions prior to 17.2R1."}, {"lang": "es", "value": "Una vulnerabilidad en el reenv\u00edo de paquetes TCPv6 de tr\u00e1nsito recibidos en la interfaz de administraci\u00f3n Ethernet de Juniper Networks Junos OS, permite a un atacante desencadenar un p\u00e1nico en el kernel, conllevando a una Denegaci\u00f3n de Servicio (DoS).&#xa0;La recepci\u00f3n y el procesamiento continuo de estos paquetes de tr\u00e1nsito crear\u00e1n una condici\u00f3n sostenida de Denegaci\u00f3n de Servicio (DoS).&#xa0;Este problema solo ocurre cuando los paquetes TCPv6 se enrutan por medio de la interfaz de administraci\u00f3n.&#xa0;El resto del tr\u00e1fico de tr\u00e1nsito y el tr\u00e1fico destinado a la interfaz de administraci\u00f3n no est\u00e1n afectados por esta vulnerabilidad.&#xa0;Este problema se introdujo como parte de una funcionalidad TCP Parallelization agregada en Junos OS versi\u00f3n 17.2 y afecta a los sistemas con la pila de red concurrente habilitada.&#xa0;Esta funcionalidad est\u00e1 habilitada por defecto pero puede ser desahbilitada (consulte la secci\u00f3n WORKAROUND a continuaci\u00f3n).&#xa0;Este problema afecta a Junos de Juniper Networks OS: versiones 17.2 anteriores a 17.2R3-S4;&#xa0;versiones 17.&#xa0;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-S11;&#xa0;versiones 18.2 anteriores a 18.2R3-S5;&#xa0;versiones 18.3 anteriores a 18.3R2-S4, 18.3R3-S3;&#xa0;versiones 18.4 anteriores a 18.4R2-S5, 18.4R3-S4;&#xa0;versiones 19.1 anteriores a 19.1R2-S2, 19.1R3;&#xa0;versiones 19.2 anteriores a 19.2R1-S5, 19.2R2;&#xa0;versiones 19.3 anteriores a 19.3R2-S4, 19.3R3;&#xa0;Versiones 19.4 anteriores a 19.4R1-S3, 19.4R2.&#xa0;Este problema no afecta a Junos de Juniper Networks OS versiones anteriores a 17.2R1"}], "id": "CVE-2021-0258", "lastModified": "2021-04-28T20:34:29.277", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.1, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "sirt@juniper.net", "type": "Primary"}]}, "published": "2021-04-22T20:15:09.597", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11149"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-362"}], "source": "sirt@juniper.net", "type": "Secondary"}]}

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