{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-10T23:13:23.295","vulnerabilities":[{"cve":{"id":"CVE-2020-1662","sourceIdentifier":"sirt@juniper.net","published":"2020-10-16T21:15:12.443","lastModified":"2024-11-21T05:11:06.633","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"On Juniper Networks Junos OS and Junos OS Evolved devices, BGP session flapping can lead to a routing process daemon (RPD) crash and restart, limiting the attack surface to configured BGP peers. This issue only affects devices with BGP damping in combination with accepted-prefix-limit configuration. When the issue occurs the following messages will appear in the /var/log/messages: rpd[6046]: %DAEMON-4-BGP_PREFIX_THRESH_EXCEEDED: XXXX (External AS x): Configured maximum accepted prefix-limit threshold(1800) exceeded for inet6-unicast nlri: 1984 (instance master) rpd[6046]: %DAEMON-3-BGP_CEASE_PREFIX_LIMIT_EXCEEDED: 2001:x:x:x::2 (External AS x): Shutting down peer due to exceeding configured maximum accepted prefix-limit(2000) for inet6-unicast nlri: 2001 (instance master) rpd[6046]: %DAEMON-4: bgp_rt_maxprefixes_check_common:9284: NOTIFICATION sent to 2001:x:x:x::2 (External AS x): code 6 (Cease) subcode 1 (Maximum Number of Prefixes Reached) AFI: 2 SAFI: 1 prefix limit 2000 kernel: %KERN-5: mastership_relinquish_on_process_exit: RPD crashed on master RE. Sending SIGUSR2 to chassisd (5612:chassisd) to trigger RE switchover This issue affects: Juniper Networks Junos OS: 17.2R3-S3; 17.3 version 17.3R3-S3 and later versions, prior to 17.3R3-S8; 17.4 version 17.4R2-S4, 17.4R3 and later versions, prior to 17.4R2-S10, 17.4R3-S2; 18.1 version 18.1R3-S6 and later versions, prior to 18.1R3-S10; 18.2 version 18.2R3 and later versions, prior to 18.2R3-S4; 18.2X75 version 18.2X75-D50, 18.2X75-D60 and later versions, prior to 18.2X75-D53, 18.2X75-D65; 18.3 version 18.3R2 and later versions, prior to 18.3R2-S4, 18.3R3-S2; 18.4 version 18.4R2 and later versions, prior to 18.4R2-S5, 18.4R3-S2; 19.1 version 19.1R1 and later versions, prior to 19.1R2-S2, 19.1R3-S1; 19.2 version 19.2R1 and later versions, prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2-S3, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2; 20.1 versions prior to 20.1R1-S2, 20.1R2. Juniper Networks Junos OS Evolved prior to 20.1R2-EVO. This issue does not affect Juniper Networks Junos OS versions prior to 17.2R3-S3."},{"lang":"es","value":"En los dispositivos Juniper Networks Junos OS y Junos OS Evolved, la interrupción de la sesión BGP puede conllevar a un bloqueo y reinicio del routing process daemon (RPD), limitando la superficie de ataque a los peers BGP configurados. Este problema solo afecta a los dispositivos con amortiguación BGP en combinación con la configuración accepted-prefix-limit. Cuando el problema ocurre, aparecerán los siguientes mensajes en /var/log/messages: rpd[6046]: %DAEMON-4-BGP_PREFIX_THRESH_EXCEEDED: XXXX (External AS x): Configured maximum accepted prefix-limit threshold(1800) exceeded for inet6-unicast nlri: 1984 (instance master) rpd[6046]: %DAEMON-3-BGP_CEASE_PREFIX_LIMIT_EXCEEDED: 2001:x:x:x::2 (External AS x): Shutting down peer due to exceeding configured maximum accepted prefix-limit(2000) for inet6-unicast nlri: 2001 (instance master) rpd[6046]: %DAEMON-4: bgp_rt_maxprefixes_check_common:9284: NOTIFICATION sent to 2001:x:x:x::2 (External AS x): code 6 (Cease) subcode 1 (Maximum Number of Prefixes Reached) AFI: 2 SAFI: 1 prefix limit 2000 kernel: %KERN-5: mastership_relinquish_on_process_exit: RPD crashed on master RE. Sending SIGUSR2 to chassisd (5612:chassisd) to trigger RE switchover. Este problema afecta a: Juniper Networks Junos OS: versión 17.2R3-S3; versiones 17.3 17.3R3-S3 y versiones posteriores, anteriores a 17.3R3-S8; 17.4 versión 17.4R2-S4, 17.4R3 y versiones posteriores, anteriores a 17.4R2-S10, 17.4R3-S2; 18.1 versión 18.1R3-S6 y versiones posteriores, anteriores a 18.1R3-S10; 18.2 versión 18.2R3 y versiones posteriores, anteriores a 18.2R3-S4; 18.2X75 versión 18.2X75-D50, 18.2X75-D60 y versiones posteriores, anteriores a 18.2X75-D53, 18.2X75-D65; 18.3 versión 18.3R2 y versiones posteriores, anteriores a 18.3R2-S4, 18.3R3-S2; 18.4 versión 18.4R2 y versiones posteriores, anteriores a 18.4R2-S5, 18. 4R3-S2; 19.1 versión 19.1R1 y versiones posteriores, anteriores a 19.1R2-S2, 19.1R3-S1; 19.2 versión 19.2R1 y versiones posteriores, anteriores a 19.2R1-S5, 19.2R2; 19.3 versiones anteriores a 19.3R2-S3, 19.3R3; 19.4 versiones anteriores a 19.4R1-S3, 19.4R2; Versiones 20.1 anteriores a 20.1R1-S2, 20.1R2. Juniper Networks Junos OS Evolved versiones anteriores a 20.1R2-EVO. Este problema no afecta a Juniper Networks Junos OS versiones anteriores a 17.2R3-S3"}],"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:M/Au:N/C:N/I:N/A:P","baseScore":4.3,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":8.6,"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-20"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"NVD-CWE-noinfo"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.2:r3-s3:*:*:*:*:*:*","matchCriteriaId":"7939BCE6-D4E8-4366-B954-32D77F21A35D"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.3:r3-s3:*:*:*:*:*:*","matchCriteriaId":"488BB10A-1360-42E5-A68D-23D51B332850"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.3:r3-s4:*:*:*:*:*:*","matchCriteriaId":"64988F0A-E02C-455B-99C9-4059C896416F"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.3:r3-s7:*:*:*:*:*:*","matchCriteriaId":"C9C703CA-9309-413A-9CD7-585277ADD32D"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.4:r2-s4:*:*:*:*:*:*","matchCriteriaId":"2B482BCC-1F0C-47AA-B63B-1B39CEF7B2C0"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.4:r2-s5:*:*:*:*:*:*","matchCriteriaId":"A636F9F2-2DA7-4A27-AD80-FD1B34DFCA94"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.4:r2-s6:*:*:*:*:*:*","matchCriteriaId":"4EC7D216-D8F3-4ABD-97C9-4C9FB6DF64FF"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.4:r2-s7:*:*:*:*:*:*","matchCriteriaId":"5E327643-D8D8-4EFA-9F38-BA862A919501"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.4:r2-s8:*:*:*:*:*:*","matchCriteriaId":"1BC6CE1C-9DD8-429E-BDC2-251D8C8674E3"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:17.4:r2-s9:*:*:*:*:*:*","matchCriteriaId":"63B00B4F-3E65-4CB2-807D-43908B570AE6"},{"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:18.1:r3-s6:*:*:*:*:*:*","matchCriteriaId":"7988CE92-71D2-4EEC-B596-4A60E2C1136A"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.1:r3-s7:*:*:*:*:*:*","matchCriteriaId":"330D176F-8DAD-440C-A623-44FA233FAB01"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.1:r3-s8:*:*:*:*:*:*","matchCriteriaId":"8CC5EAB8-1364-4325-9F01-BE7CC479C29D"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.1:r3-s9:*:*:*:*:*:*","matchCriteriaId":"4E2E933A-852F-4257-860D-09638EE0D2F3"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.2:r3:*:*:*:*:*:*","matchCriteriaId":"B670F988-78F2-4BC6-B7FC-E34C280F67DC"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.2:r3-s1:*:*:*:*:*:*","matchCriteriaId":"2F9451C7-6466-4AC9-9A7F-90A2817AED6C"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.2:r3-s2:*:*:*:*:*:*","matchCriteriaId":"871CA952-C5EC-4A25-8EF0-C2EC484F7DE9"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.2:r3-s3:*:*:*:*:*:*","matchCriteriaId":"80E2AD65-3DAC-4618-AB73-C43EDCDC7A13"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.2x75:d50:*:*:*:*:*:*","matchCriteriaId":"EAB1E336-C92A-4A65-A3D9-F2926E76A598"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.2x75:d51:*:*:*:*:*:*","matchCriteriaId":"0F15B017-F0AB-4DB7-9718-85C97CBC19DF"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.2x75:d60:*:*:*:*:*:*","matchCriteriaId":"0A109959-DE76-44D3-9AE2-0106875B03A0"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.3:r2:*:*:*:*:*:*","matchCriteriaId":"B7A3FBD3-5399-42A9-9BD9-E3C981CBD6DB"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.3:r2-s1:*:*:*:*:*:*","matchCriteriaId":"4EBD361C-8B4D-43EF-8B82-9FE165D8206E"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.3:r2-s2:*:*:*:*:*:*","matchCriteriaId":"6E7539C4-6208-43EB-9A0B-4852D0CE0FA1"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:18.3:r2-s3:*:*:*:*:*:*","matchCriteriaId":"35299B02-DC75-458D-B86D-8A0DB95B06AA"},{"vulnerable":true,"criteria":"cpe:2.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Advisory"]},{"url":"https://kb.juniper.net/JSA11059","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]}]}}]}