{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-17T15:25:06.093","vulnerabilities":[{"cve":{"id":"CVE-2021-31351","sourceIdentifier":"sirt@juniper.net","published":"2021-10-19T19:15:08.597","lastModified":"2024-11-21T06:05:28.723","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"An Improper Check for Unusual or Exceptional Conditions in packet processing on the MS-MPC/MS-MIC utilized by Juniper Networks Junos OS allows a malicious attacker to send a specific packet, triggering the MS-MPC/MS-MIC to reset, causing a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects specific versions of Juniper Networks Junos OS on MX Series: 17.3R3-S11; 17.4R2-S13; 17.4R3 prior to 17.4R3-S5; 18.1R3-S12; 18.2R2-S8, 18.2R3-S7, 18.2R3-S8; 18.3R3-S4; 18.4R3-S7; 19.1R3-S4, 19.1R3-S5; 19.2R1-S6; 19.3R3-S2; 19.4R2-S4, 19.4R2-S5; 19.4R3-S2; 20.1R2-S1; 20.2R2-S2, 20.2R2-S3, 20.2R3; 20.3R2, 20.3R2-S1; 20.4R1, 20.4R1-S1, 20.4R2; 21.1R1; This issue does not affect any version of Juniper Networks Junos OS prior to 15.1X49-D240;"},{"lang":"es","value":"Una comprobación inapropiada de condiciones inusuales o excepcionales en el procesamiento de paquetes en el MS-MPC/MS-MIC usado por Juniper Networks Junos OS permite a un atacante malicioso enviar un paquete específico, haciendo que el MS-MPC/MS-MIC se reinicie, causando una Denegación de Servicio (DoS). Si se sigue recibiendo y procesando este paquete, se creará una condición de Denegación de Servicio (DoS) sostenida. Este problema sólo afecta a versiones específicas de Juniper Networks Junos OS en la serie MX: 17.3R3-S11; 17.4R2-S13; 17.4R3 anterior a 17.4R3-S5; 18.1R3-S12; 18.2R2-S8, 18.2R3-S7, 18.2R3-S8; 18.3R3-S4; 18.4R3-S7; 19.1R3-S4, 19.1R3-S5; 19.2R1-S6; 19.3R3-S2; 19.4R2-S4, 19.4R2-S5; 19. 4R3-S2; 20.1R2-S1; 20.2R2-S2, 20.2R2-S3, 20.2R3; 20.3R2, 20.3R2-S1; 20.4R1, 20.4R1-S1, 20.4R2; 21.1R1; Este problema no afecta a ninguna versión de Juniper Networks Junos OS anterior a la 15.1X49-D240;"}],"metrics":{"cvssMetricV31":[{"source":"sirt@juniper.net","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P","baseScore":5.0,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":10.0,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"sirt@juniper.net","type":"Secondary","description":[{"lang":"en","value":"CWE-754"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-754"}]}],"configurations":[{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.3:r3-s11:*:*:*:*:*:*","matchCriteriaId":"DE0C7BD5-4D13-4C20-B2C9-524F72B206F2"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.4:r2-s13:*:*:*:*:*:*","matchCriteriaId":"03BCD35E-29D3-4F8C-ABE9-32C7010FD796"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.4:r3:*:*:*:*:*:*","matchCriteriaId":"8732E25A-9073-4C7B-9E89-C02368728EB4"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.4:r3-s1:*:*:*:*:*:*","matchCriteriaId":"09255363-BF79-4FC3-AADD-5FAD0902174F"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.4:r3-s2:*:*:*:*:*:*","matchCriteriaId":"11A24AA6-5378-4EEA-82D5-66A5F1110698"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.4:r3-s3:*:*:*:*:*:*","matchCriteriaId":"64CF2868-993A-48C8-8FBA-892507BBBF21"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.4:r3-s4:*:*:*:*:*:*","matchCriteriaId":"D2D5D460-EC5C-46BF-8017-CB87B45C69BD"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.1:r3-s12:*:*:*:*:*:*","matchCriteriaId":"46F9BD74-D57A-4689-81AB-D53DEBABBD5E"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.2:r2-s8:*:*:*:*:*:*","matchCriteriaId":"27D9AEBC-2CA3-4E17-9543-D60B10BA2AE1"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.2:r3-s7:*:*:*:*:*:*","matchCriteriaId":"F2DEF924-0165-41B5-8A9D-A75596433CD2"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.2:r3-s8:*:*:*:*:*:*","matchCriteriaId":"72BA91B4-6595-4CD1-82F7-535AE2D0305A"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.3:r3-s4:*:*:*:*:*:*","matchCriteriaId":"75F125DC-3A21-489F-B324-A586F5BA350A"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.4:r3-s7:*:*:*:*:*:*","matchCriteriaId":"14FC491D-8DA8-4E79-A9A6-3629E41C847A"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:19.1:r3-s4:*:*:*:*:*:*","matchCriteriaId":"69E2DF80-63D8-48DD-BC73-C406B7AA3C7D"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:19.1:r3-s5:*:*:*:*:*:*","matchCriteriaId":"8120EAC3-DCCB-4429-A372-C0DAA3270A1F"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:19.2:r1-s6:*:*:*:*:*:*","matchCriteriaId":"ADCE4EA8-DDBA-4766-BB81-E4DA29723723"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:19.3:r3-s2:*:*:*:*:*:*","matchCriteriaId":"D3FEA876-302D-4F07-94E6-237C669538F2"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:19.4:r2-s4:*:*:*:*:*:*","matchCriteriaId":"760E2418-B945-4467-BDAC-7702DDF4C4EE"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:19.4:r2-s5:*:*:*:*:*:*","matchCriteriaId":"98097AB6-56CB-42E4-96B4-ABBD4F36553C"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:19.4:r3-s2:*:*:*:*:*:*","matchCriteriaId":"ED73BF1A-96E4-49F1-A6AA-7B29DAA6C112"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:20.1:r2-s1:*:*:*:*:*:*","matchCriteriaId":"D9789FF8-D55C-4AF9-A250-E543A0EB826F"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:20.2:r2-s2:*:*:*:*:*:*","matchCriteriaId":"8E0D4959-3865-42A7-98CD-1103EBD84528"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:20.2:r2-s3:*:*:*:*:*:*","matchCriteriaId":"3A58292B-814C-49E7-8D6D-BE26EFB9ADDF"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:20.2:r3:*:*:*:*:*:*","matchCriteriaId":"681AE183-7183-46E7-82EA-28C398FA1C3D"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:20.3:r2:*:*:*:*:*:*","matchCriteriaId":"05D8427C-CDDE-4B2F-9CB8-41B9137660E4"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:20.3:r2-s1:*:*:*:*:*:*","matchCriteriaId":"F3DC01F2-6DFE-4A8E-9962-5E59AA965935"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:20.4:r1:*:*:*:*:*:*","matchCriteriaId":"20DDC6B7-BFC4-4F0B-8E68-442C23765BF2"},{"vulnerable":true,"criteri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