{"id":"CVE-2020-1689","state":"PUBLISHED","title":"Junos OS: EX4300-MP/EX4600/QFX5K Series: High CPU load due to receipt of specific layer 2 frames when deployed in a Virtual Chassis configuration","description":"On Juniper Networks EX4300-MP Series, EX4600 Series and QFX5K Series deployed in a Virtual Chassis configuration, receipt of a stream of specific layer 2 frames can cause high CPU load, which could lead to traffic interruption. This issue does not occur when the device is deployed in Stand Alone configuration. The offending layer 2 frame packets can originate only from within the broadcast domain where the device is connected. This issue affects Juniper Networks Junos OS on EX4300-MP Series, EX4600 Series and QFX5K Series: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2, 17.4R3-S3; 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 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2.","publishedAt":"2020-10-16T20:31:38.564Z","updatedAt":"2024-09-17T01:31:50.083Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"juniper"},"assigner":"juniper","products":["Juniper Networks Junos OS"],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","versions":[{"version":"17.3","status":"affected","lessThan":"17.3R3-S9","versionType":"custom"},{"version":"17.4","status":"affected","lessThan":"17.4R2-S11, 17.4R3-S2, 17.4R3-S3","versionType":"custom"},{"version":"18.1","status":"affected","lessThan":"18.1R3-S11","versionType":"custom"},{"version":"18.2","status":"affected","lessThan":"18.2R3-S5","versionType":"custom"},{"version":"18.3","status":"affected","lessThan":"18.3R2-S4, 18.3R3-S3","versionType":"custom"},{"version":"18.4","status":"affected","lessThan":"18.4R2-S5, 18.4R3-S4","versionType":"custom"},{"version":"19.1","status":"affected","lessThan":"19.1R3-S2","versionType":"custom"},{"version":"19.2","status":"affected","lessThan":"19.2R1-S5, 19.2R3","versionType":"custom"},{"version":"19.3","status":"affected","lessThan":"19.3R2-S4, 19.3R3","versionType":"custom"},{"version":"19.4","status":"affected","lessThan":"19.4R1-S3, 19.4R2-S1, 19.4R3","versionType":"custom"},{"version":"20.1","status":"affected","lessThan":"20.1R1-S3, 20.1R2","versionType":"custom"}],"platforms":["EX4300-MP Series, EX4600Series, QFX5K Series"]}],"references":["https://kb.juniper.net/JSA11086"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T19:46:49.649Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2020/1xxx/CVE-2020-1689.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2020-1689","state":"PUBLISHED","datePublished":"2020-10-16T20:31:38.564Z","dateUpdated":"2024-09-17T01:31:50.083Z","assignerShortName":"juniper","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","dateReserved":"2019-11-04T00:00:00.000Z"},"containers":{"cna":{"title":"Junos OS: EX4300-MP/EX4600/QFX5K Series: High CPU load due to receipt of specific layer 2 frames when deployed in a Virtual Chassis configuration","descriptions":[{"lang":"en","value":"On Juniper Networks EX4300-MP Series, EX4600 Series and QFX5K Series deployed in a Virtual Chassis configuration, receipt of a stream of specific layer 2 frames can cause high CPU load, which could lead to traffic interruption. This issue does not occur when the device is deployed in Stand Alone configuration. The offending layer 2 frame packets can originate only from within the broadcast domain where the device is connected. This issue affects Juniper Networks Junos OS on EX4300-MP Series, EX4600 Series and QFX5K Series: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2, 17.4R3-S3; 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 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2."}],"affected":[{"vendor":"Juniper Networks","product":"Junos OS","versions":[{"version":"17.3","status":"affected","lessThan":"17.3R3-S9","versionType":"custom"},{"version":"17.4","status":"affected","lessThan":"17.4R2-S11, 17.4R3-S2, 17.4R3-S3","versionType":"custom"},{"version":"18.1","status":"affected","lessThan":"18.1R3-S11","versionType":"custom"},{"version":"18.2","status":"affected","lessThan":"18.2R3-S5","versionType":"custom"},{"version":"18.3","status":"affected","lessThan":"18.3R2-S4, 18.3R3-S3","versionType":"custom"},{"version":"18.4","status":"affected","lessThan":"18.4R2-S5, 18.4R3-S4","versionType":"custom"},{"version":"19.1","status":"affected","lessThan":"19.1R3-S2","versionType":"custom"},{"version":"19.2","status":"affected","lessThan":"19.2R1-S5, 19.2R3","versionType":"custom"},{"version":"19.3","status":"affected","lessThan":"19.3R2-S4, 19.3R3","versionType":"custom"},{"version":"19.4","status":"affected","lessThan":"19.4R1-S3, 19.4R2-S1, 19.4R3","versionType":"custom"},{"version":"20.1","status":"affected","lessThan":"20.1R1-S3, 20.1R2","versionType":"custom"}],"platforms":["EX4300-MP Series, EX4600Series, QFX5K Series"]}],"references":[{"url":"https://kb.juniper.net/JSA11086","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","description":"CWE-400 Uncontrolled Resource Consumption","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"juniper","dateUpdated":"2020-10-16T20:31:38.000Z","orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968"},"configurations":[{"lang":"en","value":"To check if virtual chassis is configured, the administrator can run the following command:\n  user@switch> show virtual-chassis status\n  Virtual Chassis Mode: Enabled"}],"datePublic":"2020-10-14T00:00:00.000Z","exploits":[{"lang":"en","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"solutions":[{"lang":"en","value":"The following software releases have been updated to resolve this specific issue: Junos OS 17.3R3-S9, 17.4R2-S11, 17.4R3-S2, 17.4R3-S3, 18.1R3-S11, 18.2R3-S5, 18.3R2-S4, 18.3R3-S3, 18.4R2-S5, 18.4R3-S4, 19.1R3-S2, 19.2R1-S5, 19.2R3, 19.3R2-S4, 19.3R3, 19.4R1-S3, 19.4R2-S1, 19.4R3, 20.1R1-S3, 20.1R2, 20.2R1, and all subsequent releases."}],"source":{"advisory":"JSA11086","defect":["1495890"],"discovery":"USER"},"workarounds":[{"lang":"en","value":"There are no viable workarounds for this issue."}],"x_generator":{"engine":"Vulnogram 0.0.9"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"sirt@juniper.net","DATE_PUBLIC":"2020-10-14T16:00:00.000Z","ID":"CVE-2020-1689","STATE":"PUBLIC","TITLE":"Junos OS: EX4300-MP/EX4600/QFX5K Series: High CPU load due to receipt of specific layer 2 frames when deployed in a Virtual Chassis configuration"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Junos OS","version":{"version_data":[{"platform":"EX4300-MP Series, EX4600Series, QFX5K Series","version_affected":"<","version_name":"17.3","version_value":"17.3R3-S9"},{"platform":"EX4300-MP Series, EX4600Series, QFX5K Series","version_affected":"<","version_name":"17.4","version_value":"17.4R2-S11, 17.4R3-S2, 17.4R3-S3"},{"platform":"EX4300-MP Series, EX4600Series, QFX5K Series","version_affected":"<","version_name":"18.1","version_value":"18.1R3-S11"},{"platform":"EX4300-MP Series, EX4600Series, QFX5K Series","version_affected":"<","version_name":"18.2","version_value":"18.2R3-S5"},{"platform":"EX4300-MP Series, EX4600Series, QFX5K Series","version_affected":"<","version_name":"18.3","version_value":"18.3R2-S4, 18.3R3-S3"},{"platform":"EX4300-MP Series, EX4600Series, QFX5K Series","version_affected":"<","version_name":"18.4","version_value":"18.4R2-S5, 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This issue does not occur when the device is deployed in Stand Alone configuration. The offending layer 2 frame packets can originate only from within the broadcast domain where the device is connected. This issue affects Juniper Networks Junos OS on EX4300-MP Series, EX4600 Series and QFX5K Series: 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2, 17.4R3-S3; 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 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2."}]},"exploit":[{"lang":"en","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"generator":{"engine":"Vulnogram 0.0.9"},"impact":{"cvss":{"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"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-400 Uncontrolled Resource Consumption"}]}]},"references":{"reference_data":[{"name":"https://kb.juniper.net/JSA11086","refsource":"CONFIRM","url":"https://kb.juniper.net/JSA11086"}]},"solution":[{"lang":"en","value":"The following software releases have been updated to resolve this specific issue: Junos OS 17.3R3-S9, 17.4R2-S11, 17.4R3-S2, 17.4R3-S3, 18.1R3-S11, 18.2R3-S5, 18.3R2-S4, 18.3R3-S3, 18.4R2-S5, 18.4R3-S4, 19.1R3-S2, 19.2R1-S5, 19.2R3, 19.3R2-S4, 19.3R3, 19.4R1-S3, 19.4R2-S1, 19.4R3, 20.1R1-S3, 20.1R2, 20.2R1, and all subsequent releases."}],"source":{"advisory":"JSA11086","defect":["1495890"],"discovery":"USER"},"work_around":[{"lang":"en","value":"There are no viable workarounds for this issue."}]}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://kb.juniper.net/JSA11086","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T06:46:30.917Z"}}]}}}