CVE-2021-0227

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Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. When this issue occurs, web-management, NTP daemon (ntpd) and Layer 2 Control Protocol process (L2CPD) daemons might crash. 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Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. When this issue occurs, web-management, NTP daemon (ntpd) and Layer 2 Control Protocol process (L2CPD) daemons might crash. 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Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. When this issue occurs, web-management, NTP daemon (ntpd) and Layer 2 Control Protocol process (L2CPD) daemons might crash. This issue affects Juniper Networks Junos OS on SRX Series: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2; 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 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R3; 19.4 versions prior to 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S2, 20.1R2;"}, {"lang": "es", "value": "Una vulnerabilidad de restricci\u00f3n inapropiada de operaciones dentro de los l\u00edmites de un b\u00fafer de memoria en Juniper Networks Junos OS J-Web en dispositivos de la serie SRX permite a un atacante causar una Denegaci\u00f3n de Servicio (DoS) mediante el env\u00edo de determinados paquetes HTTP dise\u00f1ados.&#xa0;La recepci\u00f3n y el procesamiento continuo de estos paquetes crear\u00e1n una condici\u00f3n sostenida de Denegaci\u00f3n de Servicio (DoS).&#xa0;Cuando ocurre este problema, la administraci\u00f3n web, el demonio NTP (ntpd) y el demonio del proceso Layer 2 Control Protocol (L2CPD) pueden bloquearse.&#xa0;Este problema afecta a Juniper Networks Junos OS en la serie SRX: versiones 17.3 anteriores a 17.3R3-S9;&#xa0;versiones 17.4 anteriores a 17.4R2-S11, 17.4R3-S2;&#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 19.1R3-S2;&#xa0;versiones 19.2 anteriores a 19.2R1-S5, 19.2R3;&#xa0;versiones 19.3 anteriores a 19.3R3;&#xa0;versiones 19.&#xa0;4 anteriores a 19.4R2-S1, 19.4R3;&#xa0;versiones 20.1 anteriores a 20.1R1-S2, 20.1R2;"}], "id": "CVE-2021-0227", "lastModified": "2026-06-17T03:29:32.457", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "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": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "sirt@juniper.net", "type": "Secondary"}]}, "published": "2021-04-22T20:15:08.533", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11122"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11122"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "sirt@juniper.net", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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