CVE-2021-0259

{"containers": {"cna": {"affected": [{"platforms": ["QFX5K Series"], "product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"lessThan": "17.3R3-S11", "status": "affected", "version": "17.3", "versionType": "custom"}, {"lessThan": "17.4R3-S5", "status": "affected", "version": "17.4", "versionType": "custom"}, {"lessThan": "18.1R3-S13", "status": "affected", "version": "18.1", "versionType": "custom"}, {"lessThan": "18.2R2-S8, 18.2R3-S8", "status": "affected", "version": "18.2", "versionType": "custom"}, {"lessThan": "18.3R3-S5", "status": "affected", "version": "18.3", "versionType": "custom"}, {"lessThan": "18.4R1-S8, 18.4R2-S6, 18.4R3-S6", "status": "affected", "version": "18.4", "versionType": "custom"}, {"lessThan": "19.1R3-S4", "status": "affected", "version": "19.1", "versionType": "custom"}, {"lessThan": "19.2R1-S6, 19.2R3-S2", "status": "affected", "version": "19.2", "versionType": "custom"}, {"lessThan": "19.3R3-S2", "status": "affected", "version": "19.3", "versionType": "custom"}, {"lessThan": "19.4R2-S4, 19.4R3-S1", "status": "affected", "version": "19.4", "versionType": "custom"}, {"lessThan": "20.1R2", "status": "affected", "version": "20.1", "versionType": "custom"}, {"lessThan": "20.2R2", "status": "affected", "version": "20.2", "versionType": "custom"}, {"lessThan": "20.3R1-S2, 20.3R2", "status": "affected", "version": "20.3", "versionType": "custom"}]}, {"platforms": ["QFX5220"], "product": "Junos OS Evolved", "vendor": "Juniper Networks", "versions": [{"lessThan": "20.3R2-EVO", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "configurations": [{"lang": "en", "value": "An example of a configuration affected by this issue is shown below:\n\n routing-instance evpn10 {\n vtep-source-interface lo0.0;\n instance-type evpn;\n vlan-id 10;\n interface xe-0/0/2.10;\n vxlan {\n vni 10;\n }\n route-distinguisher 10.255.181.13:10;\n vrf-target target:10:10;\n protocols {\n evpn;\n }\n }"}], "datePublic": "2021-04-14T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "Due to a vulnerability in DDoS protection in Juniper Networks Junos OS and Junos OS Evolved on QFX5K Series switches in a VXLAN configuration, instability might be experienced in the underlay network as a consequence of exceeding the default ddos-protection aggregate threshold. If an attacker on a client device on the overlay network sends a high volume of specific, legitimate traffic in the overlay network, due to an improperly detected DDoS violation, the leaf might not process certain L2 traffic, sent by spines in the underlay network. Continued receipt and processing of the high volume traffic will sustain the Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS on QFX5K Series: 17.3 versions prior to 17.3R3-S11; 17.4 versions prior to 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R2-S8, 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R1-S8, 18.4R2-S6, 18.4R3-S6; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R1-S6, 19.2R3-S2; 19.3 versions prior to 19.3R3-S2; 19.4 versions prior to 19.4R2-S4, 19.4R3-S1; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2; 20.3 versions prior to 20.3R1-S2, 20.3R2. Juniper Networks Junos OS Evolved on QFX5220: All versions prior to 20.3R2-EVO."}], "exploits": [{"lang": "en", "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-755", "description": "CWE-755 Improper Handling of Exceptional Conditions", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"description": "Denial of Service (DoS)", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-04-22T19:37:18.000Z", "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "shortName": "juniper"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://kb.juniper.net/JSA11150"}], "solutions": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue:\n\nJunos OS: 17.3R3-S11, 17.4R3-S5, 18.1R3-S13, 18.2R2-S8, 18.2R3-S8, 18.3R3-S5, 18.4R1-S8, 18.4R2-S6, 18.4R3-S6, 19.1R3-S4, 19.2R1-S6, 19.2R3-S2, 19.3R3-S2, 19.4R2-S4, 19.4R3-S1, 20.1R2, 20.2R2, 20.3R1-S2, 20.3R2, 20.4R1, and all subsequent releases.\n\nJunos OS Evolved: 20.3R2-EVO, 20.4R1-EVO, and all subsequent releases."}], "source": {"advisory": "JSA11150", "defect": ["1499681"], "discovery": "USER"}, "title": "Junos OS and Junos OS Evolved: QFX5K Series: Underlay network traffic might not be processed upon receipt of high rate of specific genuine overlay packets in VXLAN scenario", "workarounds": [{"lang": "en", "value": "There are no available workarounds for this issue."}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "sirt@juniper.net", "DATE_PUBLIC": "2021-04-14T16:00:00.000Z", "ID": "CVE-2021-0259", "STATE": "PUBLIC", "TITLE": "Junos OS and Junos OS Evolved: QFX5K Series: Underlay network traffic might not be processed upon receipt of high rate of specific genuine overlay packets in VXLAN scenario"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Junos OS", "version": {"version_data": [{"platform": "QFX5K Series", "version_affected": "<", "version_name": "17.3", "version_value": "17.3R3-S11"}, {"platform": "QFX5K Series", "version_affected": "<", "version_name": "17.4", "version_value": "17.4R3-S5"}, {"platform": "QFX5K Series", "version_affected": "<", "version_name": "18.1", "version_value": "18.1R3-S13"}, {"platform": "QFX5K Series", "version_affected": "<", "version_name": "18.2", "version_value": "18.2R2-S8, 18.2R3-S8"}, {"platform": "QFX5K Series", "version_affected": "<", "version_name": "18.3", "version_value": "18.3R3-S5"}, {"platform": "QFX5K Series", "version_affected": "<", "version_name": "18.4", "version_value": "18.4R1-S8, 18.4R2-S6, 18.4R3-S6"}, {"platform": "QFX5K Series", "version_affected": "<", "version_name": "19.1", "version_value": "19.1R3-S4"}, {"platform": "QFX5K Series", "version_affected": "<", "version_name": "19.2", "version_value": "19.2R1-S6, 19.2R3-S2"}, {"platform": "QFX5K Series", "version_affected": "<", "version_name": "19.3", "version_value": "19.3R3-S2"}, {"platform": "QFX5K Series", "version_affected": "<", "version_name": "19.4", "version_value": "19.4R2-S4, 19.4R3-S1"}, {"platform": "QFX5K Series", "version_affected": "<", "version_name": "20.1", "version_value": "20.1R2"}, {"platform": "QFX5K Series", "version_affected": "<", "version_name": "20.2", "version_value": "20.2R2"}, {"platform": "QFX5K Series", "version_affected": "<", "version_name": "20.3", "version_value": "20.3R1-S2, 20.3R2"}]}}, {"product_name": "Junos OS Evolved", "version": {"version_data": [{"platform": "QFX5220", "version_affected": "<", "version_value": "20.3R2-EVO"}]}}]}, "vendor_name": "Juniper Networks"}]}}, "configuration": [{"lang": "en", "value": "An example of a configuration affected by this issue is shown below:\n\n routing-instance evpn10 {\n vtep-source-interface lo0.0;\n instance-type evpn;\n vlan-id 10;\n interface xe-0/0/2.10;\n vxlan {\n vni 10;\n }\n route-distinguisher 10.255.181.13:10;\n vrf-target target:10:10;\n protocols {\n evpn;\n }\n }"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Due to a vulnerability in DDoS protection in Juniper Networks Junos OS and Junos OS Evolved on QFX5K Series switches in a VXLAN configuration, instability might be experienced in the underlay network as a consequence of exceeding the default ddos-protection aggregate threshold. If an attacker on a client device on the overlay network sends a high volume of specific, legitimate traffic in the overlay network, due to an improperly detected DDoS violation, the leaf might not process certain L2 traffic, sent by spines in the underlay network. Continued receipt and processing of the high volume traffic will sustain the Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS on QFX5K Series: 17.3 versions prior to 17.3R3-S11; 17.4 versions prior to 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R2-S8, 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R1-S8, 18.4R2-S6, 18.4R3-S6; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R1-S6, 19.2R3-S2; 19.3 versions prior to 19.3R3-S2; 19.4 versions prior to 19.4R2-S4, 19.4R3-S1; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2; 20.3 versions prior to 20.3R1-S2, 20.3R2. Juniper Networks Junos OS Evolved on QFX5220: All versions prior to 20.3R2-EVO."}]}, "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": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-755 Improper Handling of Exceptional Conditions"}]}, {"description": [{"lang": "eng", "value": "Denial of Service (DoS)"}]}]}, "references": {"reference_data": [{"name": "https://kb.juniper.net/JSA11150", "refsource": "MISC", "url": "https://kb.juniper.net/JSA11150"}]}, "solution": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue:\n\nJunos OS: 17.3R3-S11, 17.4R3-S5, 18.1R3-S13, 18.2R2-S8, 18.2R3-S8, 18.3R3-S5, 18.4R1-S8, 18.4R2-S6, 18.4R3-S6, 19.1R3-S4, 19.2R1-S6, 19.2R3-S2, 19.3R3-S2, 19.4R2-S4, 19.4R3-S1, 20.1R2, 20.2R2, 20.3R1-S2, 20.3R2, 20.4R1, and all subsequent releases.\n\nJunos OS Evolved: 20.3R2-EVO, 20.4R1-EVO, and all subsequent releases."}], "source": {"advisory": "JSA11150", "defect": ["1499681"], "discovery": "USER"}, "work_around": [{"lang": "en", "value": "There are no available workarounds for this issue."}]}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:32:10.668Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://kb.juniper.net/JSA11150"}]}]}, "cveMetadata": {"assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "assignerShortName": "juniper", "cveId": "CVE-2021-0259", "datePublished": "2021-04-22T19:37:18.777Z", "dateReserved": "2020-10-27T00:00:00.000Z", "dateUpdated": "2024-09-16T17:48:16.147Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

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If an attacker on a client device on the overlay network sends a high volume of specific, legitimate traffic in the overlay network, due to an improperly detected DDoS violation, the leaf might not process certain L2 traffic, sent by spines in the underlay network. Continued receipt and processing of the high volume traffic will sustain the Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS on QFX5K Series: 17.3 versions prior to 17.3R3-S11; 17.4 versions prior to 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R2-S8, 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R1-S8, 18.4R2-S6, 18.4R3-S6; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R1-S6, 19.2R3-S2; 19.3 versions prior to 19.3R3-S2; 19.4 versions prior to 19.4R2-S4, 19.4R3-S1; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2; 20.3 versions prior to 20.3R1-S2, 20.3R2. Juniper Networks Junos OS Evolved on QFX5220: All versions prior to 20.3R2-EVO."}, {"lang": "es", "value": "Debido a una vulnerabilidad en la protecci\u00f3n DDoS en Juniper Networks Junos OS y Junos OS Evolved en switches de la serie QFX5K en una configuraci\u00f3n VXLAN, una inestabilidad puede ser experimentada en la red subyacente como consecuencia de exceder el umbral agregado predeterminado ddos-protection.&#xa0;Si un atacante en un dispositivo cliente en la red superpuesta env\u00eda un gran volumen de tr\u00e1fico leg\u00edtimo espec\u00edfico en la red superpuesta, debido a una violaci\u00f3n de DDoS detectada inapropiadamente, es posible que la hoja no procese determinado tr\u00e1fico L2, enviado por espinas en la red subyacente.&#xa0;La recepci\u00f3n y el procesamiento continuo del tr\u00e1fico de alto volumen mantendr\u00e1 la condici\u00f3n de Denegaci\u00f3n de Servicio (DoS).&#xa0;Este problema afecta a: Juniper Networks Junos OS en la serie QFX5K: versiones 17.3 anteriores a 17.3R3-S11;&#xa0;versiones 17.4 anteriores a 17.4R3-S5;&#xa0;versiones 18.1 anteriores a 18.1R3-S13;&#xa0;versiones 18.2 anteriores a 18.2R2-S8,&#xa0;18,2R3-S8;&#xa0;versiones 18.3 anteriores a 18.3R3-S5;&#xa0;versiones 18.4 anteriores a 18.4R1-S8, 18.4R2-S6, 18.4R3-S6;&#xa0;versiones 19.1 anteriores a 19.1R3-S4;&#xa0;versiones 19.2 anteriores a 19.2R1-S6, 19.2R3-S2;&#xa0;versiones 19.3 anteriores a 19.3R3-S2;&#xa0;versiones 19.4 anteriores a 19.4R2-S4, 19.4R3-S1;&#xa0;versiones 20.1 anteriores a 20.1R2;&#xa0;versiones 20.2 anteriores a 20.2R2;&#xa0;versiones 20.3 anteriores a 20.3R1-S2, 20.3R2.&#xa0;Juniper Networks Junos OS Evolved en QFX5220: todas las versiones anteriores a 20.3R2-EVO"}], "id": "CVE-2021-0259", "lastModified": "2026-06-17T03:29:38.190", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "ADJACENT_NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 3.3, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:A/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 6.5, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.0, "source": "sirt@juniper.net", "type": "Secondary"}]}, "published": "2021-04-22T20:15:09.630", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11150"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11150"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-755"}], "source": "sirt@juniper.net", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-755"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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