{"containers": {"cna": {"affected": [{"product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"lessThan": "19.3R3-S2", "status": "unaffected", "version": "unspecified", "versionType": "custom"}, {"status": "affected", "version": "19.3R3-S2"}, {"status": "affected", "version": "19.4R3-S3"}, {"lessThan": "20.1*", "status": "unaffected", "version": "20.1R1", "versionType": "custom"}, {"changes": [{"at": "20.2R3-S2", "status": "unaffected"}], "lessThan": "20.2R2-S3", "status": "unaffected", "version": "20.2", "versionType": "custom"}, {"changes": [{"at": "20.3R3", "status": "unaffected"}], "lessThan": "20.3R2", "status": "unaffected", "version": "20.3", "versionType": "custom"}, {"changes": [{"at": "20.4R3", "status": "unaffected"}], "lessThan": "20.4R2", "status": "unaffected", "version": "20.4", "versionType": "custom"}, {"lessThan": "21.1R2", "status": "affected", "version": "21.1", "versionType": "custom"}]}, {"product": "Junos OS Evolved", "vendor": "Juniper Networks", "versions": [{"lessThan": "20.4R2-S3-EVO, 20.4R3-EVO", "status": "affected", "version": "unspecified", "versionType": "custom"}, {"lessThan": "21.1R2-EVO", "status": "affected", "version": "21.1-EVO", "versionType": "custom"}, {"lessThan": "21.2R2-EVO", "status": "affected", "version": "21.2-EVO", "versionType": "custom"}]}], "configurations": [{"lang": "en", "value": "This issue can occur when multipath is enabled:\n\n routing-instance <vrf> routing-options multipath\n\nand one of the following two TTL propagation options (but not both) are enabled:\n\n protocols mpls no-propagate-ttl\n routing-instance <vrf> no-vrf-propagate-ttl"}], "datePublic": "2021-10-13T00:00:00", "descriptions": [{"lang": "en", "value": "An Improper Handling of Exceptional Conditions vulnerability in Juniper Networks Junos OS and Junos OS Evolved allows an attacker to inject a specific BGP update, causing the routing protocol daemon (RPD) to crash and restart, leading to a Denial of Service (DoS). Continued receipt and processing of the BGP update will create a sustained Denial of Service (DoS) condition. This issue affects very specific versions of Juniper Networks Junos OS: 19.3R3-S2; 19.4R3-S3; 20.2 versions 20.2R2-S3 and later, prior to 20.2R3-S2; 20.3 versions 20.3R2 and later, prior to 20.3R3; 20.4 versions 20.4R2 and later, prior to 20.4R3; 21.1 versions prior to 21.1R2. Juniper Networks Junos OS 20.1 is not affected by this issue. This issue also affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R2-S3-EVO, 20.4R3-EVO; 21.1-EVO versions prior to 21.1R2-EVO; 21.2-EVO versions prior to 21.2R2-EVO."}], "exploits": [{"lang": "en", "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}], "metrics": [{"cvssV3_1": {"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"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-755", "description": "CWE-755 Improper Handling of Exceptional Conditions", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-10-19T18:16:34", "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "shortName": "juniper"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://kb.juniper.net/JSA11218"}], "solutions": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue: \n\nJunos OS 18.4R2-S9, 19.1R3-S7, 19.3R3-S3, 19.4R1-S4, 19.4R3-S4, 20.1R3, 20.2R3-S2, 20.3R3, 20.4R3, 21.1R2, 21.2R1, 21.2R2, 21.3R1, and all subsequent releases.\n\nJunos OS Evolved 20.4R2-S3-EVO, 20.4R3-EVO, 21.1R2-EVO, 21.2R2-EVO, 21.3R1-EVO, and all subsequent releases.\n\nNote: Only those releases listed in the PROBLEM section above are affected. This fix has also been proactively committed into other releases that are not vulnerable to this issue."}], "source": {"advisory": "JSA11218", "defect": ["1595165"], "discovery": "USER"}, "title": "Junos OS and Junos OS Evolved: RPD core upon receipt of specific BGP update", "workarounds": [{"lang": "en", "value": "This issue can be mitigated in two ways:\n\n1) ensure that TTL propagation is either enabled or disabled in both places below:\n protocols mpls no-propagate-ttl\n routing-instance <vrf> no-vrf-propagate-ttl\n\n2) Disable multipath:\n routing-instance <vrf> routing-options multipath"}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "sirt@juniper.net", "DATE_PUBLIC": "2021-10-13T16:00:00.000Z", "ID": "CVE-2021-31353", "STATE": "PUBLIC", "TITLE": "Junos OS and Junos OS Evolved: RPD core upon receipt of specific BGP update"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Junos OS", "version": {"version_data": [{"version_affected": "!<", "version_value": "19.3R3-S2"}, {"version_affected": "=", "version_value": "19.3R3-S2"}, {"version_affected": "=", "version_value": "19.4R3-S3"}, {"version_affected": "!>=", "version_name": "20.1", "version_value": "20.1R1"}, {"version_affected": "!<", "version_name": "20.2", "version_value": "20.2R2-S3"}, {"version_affected": "<", "version_name": "20.2", "version_value": "20.2R3-S2"}, {"version_affected": "!<", "version_name": "20.3", "version_value": "20.3R2"}, {"version_affected": "<", "version_name": "20.3", "version_value": "20.3R3"}, {"version_affected": "!<", "version_name": "20.4", "version_value": "20.4R2"}, {"version_affected": "<", "version_name": "20.4", "version_value": "20.4R3"}, {"version_affected": "<", "version_name": "21.1", "version_value": "21.1R2"}]}}, {"product_name": "Junos OS Evolved", "version": {"version_data": [{"version_affected": "<", "version_value": "20.4R2-S3-EVO, 20.4R3-EVO"}, {"version_affected": "<", "version_name": "21.1-EVO", "version_value": "21.1R2-EVO"}, {"version_affected": "<", "version_name": "21.2-EVO", "version_value": "21.2R2-EVO"}]}}]}, "vendor_name": "Juniper Networks"}]}}, "configuration": [{"lang": "en", "value": "This issue can occur when multipath is enabled:\n\n routing-instance <vrf> routing-options multipath\n\nand one of the following two TTL propagation options (but not both) are enabled:\n\n protocols mpls no-propagate-ttl\n routing-instance <vrf> no-vrf-propagate-ttl"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "An Improper Handling of Exceptional Conditions vulnerability in Juniper Networks Junos OS and Junos OS Evolved allows an attacker to inject a specific BGP update, causing the routing protocol daemon (RPD) to crash and restart, leading to a Denial of Service (DoS). Continued receipt and processing of the BGP update will create a sustained Denial of Service (DoS) condition. This issue affects very specific versions of Juniper Networks Junos OS: 19.3R3-S2; 19.4R3-S3; 20.2 versions 20.2R2-S3 and later, prior to 20.2R3-S2; 20.3 versions 20.3R2 and later, prior to 20.3R3; 20.4 versions 20.4R2 and later, prior to 20.4R3; 21.1 versions prior to 21.1R2. Juniper Networks Junos OS 20.1 is not affected by this issue. This issue also affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R2-S3-EVO, 20.4R3-EVO; 21.1-EVO versions prior to 21.1R2-EVO; 21.2-EVO versions prior to 21.2R2-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": "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"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-755 Improper Handling of Exceptional Conditions"}]}]}, "references": {"reference_data": [{"name": "https://kb.juniper.net/JSA11218", "refsource": "CONFIRM", "url": "https://kb.juniper.net/JSA11218"}]}, "solution": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue: \n\nJunos OS 18.4R2-S9, 19.1R3-S7, 19.3R3-S3, 19.4R1-S4, 19.4R3-S4, 20.1R3, 20.2R3-S2, 20.3R3, 20.4R3, 21.1R2, 21.2R1, 21.2R2, 21.3R1, and all subsequent releases.\n\nJunos OS Evolved 20.4R2-S3-EVO, 20.4R3-EVO, 21.1R2-EVO, 21.2R2-EVO, 21.3R1-EVO, and all subsequent releases.\n\nNote: Only those releases listed in the PROBLEM section above are affected. 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Continued receipt and processing of the BGP update will create a sustained Denial of Service (DoS) condition. This issue affects very specific versions of Juniper Networks Junos OS: 19.3R3-S2; 19.4R3-S3; 20.2 versions 20.2R2-S3 and later, prior to 20.2R3-S2; 20.3 versions 20.3R2 and later, prior to 20.3R3; 20.4 versions 20.4R2 and later, prior to 20.4R3; 21.1 versions prior to 21.1R2. Juniper Networks Junos OS 20.1 is not affected by this issue. This issue also affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R2-S3-EVO, 20.4R3-EVO; 21.1-EVO versions prior to 21.1R2-EVO; 21.2-EVO versions prior to 21.2R2-EVO."}, {"lang": "es", "value": "Una vulnerabilidad de administraci\u00f3n inapropiada de condiciones excepcionales en Juniper Networks Junos OS y Junos OS Evolved permite a un atacante inyectar una actualizaci\u00f3n BGP espec\u00edfica, causando el bloqueo y el reinicio del demonio del protocolo de enrutamiento (RPD), conllevando a una Denegaci\u00f3n de Servicio (DoS). Si se sigue recibiendo y procesando la actualizaci\u00f3n BGP, ser\u00e1 creada una condici\u00f3n de Denegaci\u00f3n de Servicio (DoS) sostenida. Este problema afecta a versiones muy espec\u00edficas de Juniper Networks Junos OS: 19.3R3-S2; 19.4R3-S3; 20.2 versiones 20.2R2-S3 y posteriores, anteriores a 20.2R3-S2; 20.3 versiones 20.3R2 y posteriores, anteriores a 20.3R3; 20.4 versiones 20.4R2 y posteriores, anteriores a 20.4R3; versiones 21.1 anteriores a 21.1R2. Juniper Networks Junos OS 20.1 no est\u00e1 afectado por este problema. Este problema tambi\u00e9n afecta a Juniper Networks Junos OS Evolved: Todas las versiones anteriores a 20.4R2-S3-EVO, 20.4R3-EVO; 21.1-EVO versiones anteriores a 21.1R2-EVO; 21.2-EVO versiones anteriores a 21.2R2-EVO"}], "id": "CVE-2021-31353", "lastModified": "2021-10-25T21:41:46.123", "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": "Primary"}]}, "published": "2021-10-19T19:15:08.720", "references": [{"source": "sirt@juniper.net", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://kb.juniper.net/JSA11218"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-755"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-755"}], "source": "sirt@juniper.net", "type": "Secondary"}]}

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