{"containers": {"cna": {"affected": [{"product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"lessThan": "17.3R3-S12", "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": "18.2R3-S8", "status": "affected", "version": "18.2", "versionType": "custom"}, {"lessThan": "18.3R3-S5", "status": "affected", "version": "18.3", "versionType": "custom"}, {"lessThan": "18.4R2-S8, 18.4R3-S9", "status": "affected", "version": "18.4", "versionType": "custom"}, {"lessThan": "19.1R3-S6", "status": "affected", "version": "19.1", "versionType": "custom"}, {"lessThan": "19.2R1-S7, 19.2R3-S3", "status": "affected", "version": "19.2", "versionType": "custom"}, {"lessThan": "19.3R2-S6, 19.3R3-S3", "status": "affected", "version": "19.3", "versionType": "custom"}, {"lessThan": "19.4R1-S4, 19.4R1-S4, 19.4R3-S3", "status": "affected", "version": "19.4", "versionType": "custom"}, {"lessThan": "20.1R3", "status": "affected", "version": "20.1", "versionType": "custom"}, {"lessThan": "20.2R3-S1", "status": "affected", "version": "20.2", "versionType": "custom"}, {"lessThan": "20.3R3", "status": "affected", "version": "20.3", "versionType": "custom"}, {"lessThan": "20.4R3", "status": "affected", "version": "20.4", "versionType": "custom"}, {"lessThan": "21.1R2", "status": "affected", "version": "21.1", "versionType": "custom"}, {"lessThan": "12.3*", "status": "unaffected", "version": "12.3R1", "versionType": "custom"}, {"lessThan": "15.1*", "status": "unaffected", "version": "15.1R1", "versionType": "custom"}]}], "configurations": [{"lang": "en", "value": "The following minimum system configuration is necessary to be potentially exposed to this issue: \n\n* In broadband environments\n* In Enhanced Subscriber Management environment (i.e., \"system services subscriber-management enable\" is configured) \n* RADIUS server is configured for subscriber access (i.e., define RADIUS server at \"access radius-server\" or \"access profile <> radius-server\" hierarchy level)\n "}], "datePublic": "2021-10-13T00:00:00", "descriptions": [{"lang": "en", "value": "In broadband environments, including but not limited to Enhanced Subscriber Management, (CHAP, PPP, DHCP, etc.), on Juniper Networks Junos OS devices where RADIUS servers are configured for managing subscriber access and a subscriber is logged in and then requests to logout, the subscriber may be forced into a \"Terminating\" state by an attacker who is able to send spoofed messages appearing to originate from trusted RADIUS server(s) destined to the device in response to the subscriber's request. These spoofed messages cause the Junos OS General Authentication Service (authd) daemon to force the broadband subscriber into this \"Terminating\" state which the subscriber will not recover from thereby causing a Denial of Service (DoS) to the endpoint device. Once in the \"Terminating\" state, the endpoint subscriber will no longer be able to access the network. Restarting the authd daemon on the Junos OS device will temporarily clear the subscribers out of the \"Terminating\" state. As long as the attacker continues to send these spoofed packets and subscribers request to be logged out, the subscribers will be returned to the \"Terminating\" state thereby creating a persistent Denial of Service to the subscriber. An indicator of compromise may be seen by displaying the output of \"show subscribers summary\". The presence of subscribers in the \"Terminating\" state may indicate the issue is occurring. This issue affects: Juniper Networks Junos OS 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8, 18.4R3-S9; 19.1 versions prior to 19.1R3-S6; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S3; 19.4 versions prior to 19.4R1-S4, 19.4R1-S4, 19.4R3-S3; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2. This issue does not affect: Juniper Networks Junos OS 12.3 version 12.3R1 and later versions; 15.1 version 15.1R1 and later versions."}], "exploits": [{"lang": "en", "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-772", "description": "CWE-772: Missing Release of Resource after Effective Lifetime", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"description": "Denial of Service (DoS)", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-10-19T18:17:18", "orgId": 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"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": "2021-10-13T16:00:00.000Z", "ID": "CVE-2021-31378", "STATE": "PUBLIC", "TITLE": "Junos OS: An attacker sending spoofed RADIUS messages to a Junos OS device configured for broadband services may cause broadband subscribers to remain stuck in a \"Terminating\" state."}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Junos OS", "version": {"version_data": [{"version_affected": "<", "version_name": "17.3", "version_value": "17.3R3-S12"}, {"version_affected": "<", "version_name": "17.4", "version_value": "17.4R3-S5"}, {"version_affected": "<", "version_name": "18.1", "version_value": "18.1R3-S13"}, {"version_affected": "<", "version_name": "18.2", "version_value": "18.2R3-S8"}, {"version_affected": "<", "version_name": "18.3", 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a \"Terminating\" state by an attacker who is able to send spoofed messages appearing to originate from trusted RADIUS server(s) destined to the device in response to the subscriber's request. These spoofed messages cause the Junos OS General Authentication Service (authd) daemon to force the broadband subscriber into this \"Terminating\" state which the subscriber will not recover from thereby causing a Denial of Service (DoS) to the endpoint device. Once in the \"Terminating\" state, the endpoint subscriber will no longer be able to access the network. Restarting the authd daemon on the Junos OS device will temporarily clear the subscribers out of the \"Terminating\" state. As long as the attacker continues to send these spoofed packets and subscribers request to be logged out, the subscribers will be returned to the \"Terminating\" state thereby creating a persistent Denial of Service to the subscriber. An indicator of compromise may be seen by displaying the output of \"show subscribers summary\". The presence of subscribers in the \"Terminating\" state may indicate the issue is occurring. This issue affects: Juniper Networks Junos OS 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8, 18.4R3-S9; 19.1 versions prior to 19.1R3-S6; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S3; 19.4 versions prior to 19.4R1-S4, 19.4R1-S4, 19.4R3-S3; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2. This issue does not affect: Juniper Networks Junos OS 12.3 version 12.3R1 and later versions; 15.1 version 15.1R1 and later versions."}]}, "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": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-772: Missing Release of Resource after Effective Lifetime"}]}, {"description": [{"lang": "eng", "value": "Denial of Service (DoS)"}]}]}, "references": {"reference_data": [{"name": "https://kb.juniper.net/JSA11246", "refsource": "CONFIRM", "url": "https://kb.juniper.net/JSA11246"}, {"name": "https://www.juniper.net/documentation/us/en/software/junos/subscriber-mgmt-sessions/topics/topic-map/general-authentication-service-events-tracing.html", "refsource": "MISC", "url": "https://www.juniper.net/documentation/us/en/software/junos/subscriber-mgmt-sessions/topics/topic-map/general-authentication-service-events-tracing.html"}]}, "solution": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue: 17.3R3-S12, 17.4R3-S5, 18.1R3-S13, 18.2R3-S8, 18.3R3-S5, 18.4R2-S8, 18.4R3-S9, 19.1R3-S6, 19.2R1-S7, 19.2R3-S3, 19.3R2-S6, 19.3R3-S3, 19.4R1-S4, 19.4R3-S3, 20.1R3, 20.2R3-S1, 20.3R3, 20.4R3, 21.1R2, 21.2R1, and all subsequent releases.\n\n\n"}], "source": {"advisory": "JSA11246", "defect": ["1583090"], "discovery": "USER"}, "work_around": [{"lang": "en", "value": "There are no viable workarounds for this issue."}]}}}, "cveMetadata": {"assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "assignerShortName": "juniper", "cveId": "CVE-2021-31378", "datePublished": "2021-10-13T00:00:00", "dateReserved": "2021-04-15T00:00:00", "dateUpdated": "2021-10-19T18:17:18", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.0"}

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These spoofed messages cause the Junos OS General Authentication Service (authd) daemon to force the broadband subscriber into this \"Terminating\" state which the subscriber will not recover from thereby causing a Denial of Service (DoS) to the endpoint device. Once in the \"Terminating\" state, the endpoint subscriber will no longer be able to access the network. Restarting the authd daemon on the Junos OS device will temporarily clear the subscribers out of the \"Terminating\" state. As long as the attacker continues to send these spoofed packets and subscribers request to be logged out, the subscribers will be returned to the \"Terminating\" state thereby creating a persistent Denial of Service to the subscriber. An indicator of compromise may be seen by displaying the output of \"show subscribers summary\". The presence of subscribers in the \"Terminating\" state may indicate the issue is occurring. This issue affects: Juniper Networks Junos OS 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8, 18.4R3-S9; 19.1 versions prior to 19.1R3-S6; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S3; 19.4 versions prior to 19.4R1-S4, 19.4R1-S4, 19.4R3-S3; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2. This issue does not affect: Juniper Networks Junos OS 12.3 version 12.3R1 and later versions; 15.1 version 15.1R1 and later versions."}, {"lang": "es", "value": "En los entornos de banda ancha, incluidos, entre otros, los de Administraci\u00f3n Mejorada de Abonados (CHAP, PPP, DHCP, etc.), en los dispositivos Juniper Networks Junos OS en los que los servidores RADIUS est\u00e1n configurados para administrar el acceso de los abonados y un abonado ha iniciado la sesi\u00f3n y, a continuaci\u00f3n, solicita cerrarla, el abonado puede verse forzado a entrar en un estado de \"Terminating\" por un atacante que pueda enviar mensajes falsos que parezcan originarse en servidores RADIUS confiables destinados al dispositivo en respuesta a la petici\u00f3n del abonado. Estos mensajes falsos hacen que el demonio del Servicio de autenticaci\u00f3n general (authd) del sistema operativo Junos fuerce al abonado de banda ancha a entrar en este estado de \"Terminating\", del que el abonado no se recuperar\u00e1, causando as\u00ed una Denegaci\u00f3n de Servicio (DoS) al dispositivo de endpoint. Una vez en el estado de \"Terminating\", el suscriptor del endpoint ya no podr\u00e1 acceder a la red. El reinicio del demonio authd en el dispositivo del sistema operativo Junos sacar\u00e1 temporalmente a los suscriptores del estado \"Terminating\". Mientras el atacante contin\u00fae enviando estos paquetes falsos y los suscriptores soliciten ser desconectados, los suscriptores volver\u00e1n al estado \"Terminating\", creando as\u00ed una denegaci\u00f3n de servicio persistente para el suscriptor. Un indicador de compromiso puede visualizarse mostrando la salida de \"show subscribers summary\". La presencia de suscriptores en el estado \"Terminating\" puede indicar que el problema est\u00e1 ocurriendo. Este problema afecta: Juniper Networks Junos OS versiones 17.3 anteriores a 17.3R3-S12; versiones 17.4 anteriores a 17.4R3-S5; versiones 18.1 anteriores a 18.1R3-S13; versiones 18.2 anteriores a 18.2R3-S8; versiones 18.3 anteriores a 18.3R3-S5; versiones 18.4 anteriores a 18.4R2-S8, 18.4R3-S9; versiones 19.1 anteriores a 19.1R3-S6; 19. 2 versiones anteriores a 19.2R1-S7, 19.2R3-S3; versiones 19.3 anteriores a 19.3R2-S6, 19.3R3-S3; versiones 19.4 anteriores a 19.4R1-S4, 19.4R1-S4, 19.4R3-S3; 20. 1 versiones anteriores a 20.1R3; versiones 20.2 anteriores a 20.2R3-S1; versiones 20.3 anteriores a 20.3R3; versiones 20.4 anteriores a 20.4R3; versiones 21.1 anteriores a 21.1R2. Este problema no afecta: Juniper Networks Junos OS 12.3 versi\u00f3n 12.3R1 y versiones posteriores; 15.1 versi\u00f3n 15.1R1 y versiones posteriores"}], "id": "CVE-2021-31378", "lastModified": "2021-10-25T16:54:08.910", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "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": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 4.0, "source": "sirt@juniper.net", "type": "Secondary"}]}, "published": "2021-10-19T19:15:11.023", "references": [{"source": "sirt@juniper.net", "tags": ["Patch", "Vendor Advisory"], "url": "https://kb.juniper.net/JSA11246"}, {"source": "sirt@juniper.net", "tags": ["Product", "Vendor Advisory"], "url": "https://www.juniper.net/documentation/us/en/software/junos/subscriber-mgmt-sessions/topics/topic-map/general-authentication-service-events-tracing.html"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-772"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-772"}], "source": "sirt@juniper.net", "type": "Secondary"}]}

{}