{"containers": {"cna": {"affected": [{"platforms": ["PTX1000 and PTX10000 Series, QFX10000 Series"], "product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"lessThan": "17.4R2-S9, 17.4R3", "status": "affected", "version": "17.4", "versionType": "custom"}, {"lessThanOrEqual": "18.1R3-S9", "status": "affected", "version": "18.1", "versionType": "custom"}, {"lessThan": "18.2X75-D12, 18.2X75-D30", "status": "affected", "version": "18.2X75", "versionType": "custom"}, {"lessThan": "18.2R3", "status": "affected", "version": "18.2", "versionType": "custom"}, {"lessThan": "18.3R3", "status": "affected", "version": "18.3", "versionType": "custom"}]}], "configurations": [{"lang": "en", "value": "The corrupted memory initialization is restricted to the sFlow process.\nThe firewall policer provides the method for the exploitation to take place.\nDisabling either resolves the exploitation of this issue, but does not fix the underlying vulnerability.\n\nThe following minimal configuration is required for the issue to be seen: \n firewall policer\nand\n sflow"}], "datePublic": "2020-04-08T00:00:00", "descriptions": [{"lang": "en", "value": "This issue occurs on Juniper Networks Junos OS devices which do not support Advanced Forwarding Interface (AFI) / Advanced Forwarding Toolkit (AFT). 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Depending on the method for service restoration, e.g. hard boot or soft reboot, a core file may or may not be generated the next time the packet is received and inspected by sFlow. This issue affects: Juniper Networks Junos OS 17.4 versions prior to 17.4R2-S9, 17.4R3 on PTX1000 and PTX10000 Series, QFX10000 Series; 18.1 versions prior to 18.1R3-S9 on PTX1000 and PTX10000 Series, QFX10000 Series; 18.2X75 versions prior to 18.2X75-D12, 18.2X75-D30 on PTX1000 and PTX10000 Series, QFX10000 Series; 18.2 versions prior to 18.2R3 on PTX1000 and PTX10000 Series, QFX10000 Series; 18.3 versions prior to 18.3R3 on PTX1000 and PTX10000 Series, QFX10000 Series. This issue is not applicable to Junos OS versions before 17.4R1. This issue is not applicable to Junos OS Evolved or Junos OS with Advanced Forwarding Toolkit (AFT) forwarding implementations which use a different implementation of sFlow. 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Devices using AFI and AFT are not exploitable to this issue. An improper initialization of memory in the packet forwarding architecture in Juniper Networks Junos OS non-AFI/AFT platforms which may lead to a Denial of Service (DoS) vulnerability being exploited when a genuine packet is received and inspected by non-AFT/AFI sFlow and when the device is also configured with firewall policers. This first genuine packet received and inspected by sampled flow (sFlow) through a specific firewall policer will cause the device to reboot. After the reboot has completed, if the device receives and sFlow inspects another genuine packet seen through a specific firewall policer, the device will generate a core file and reboot. Continued inspection of these genuine packets will create an extended Denial of Service (DoS) condition. Depending on the method for service restoration, e.g. hard boot or soft reboot, a core file may or may not be generated the next time the packet is received and inspected by sFlow. This issue affects: Juniper Networks Junos OS 17.4 versions prior to 17.4R2-S9, 17.4R3 on PTX1000 and PTX10000 Series, QFX10000 Series; 18.1 versions prior to 18.1R3-S9 on PTX1000 and PTX10000 Series, QFX10000 Series; 18.2X75 versions prior to 18.2X75-D12, 18.2X75-D30 on PTX1000 and PTX10000 Series, QFX10000 Series; 18.2 versions prior to 18.2R3 on PTX1000 and PTX10000 Series, QFX10000 Series; 18.3 versions prior to 18.3R3 on PTX1000 and PTX10000 Series, QFX10000 Series. This issue is not applicable to Junos OS versions before 17.4R1. This issue is not applicable to Junos OS Evolved or Junos OS with Advanced Forwarding Toolkit (AFT) forwarding implementations which use a different implementation of sFlow. The following example information is unrelated to this issue and is provided solely to assist you with determining if you have AFT or not. Example: A Junos OS device which supports the use of EVPN signaled VPWS with Flexible Cross Connect uses the AFT implementation. Since this configuration requires support and use of the AFT implementation to support this configuration, the device is not vulnerable to this issue as the sFlow implementation is different using the AFT architecture. For further details about AFT visit the AFI / AFT are in the links below. If you are uncertain if you use the AFI/AFT implementation or not, there are configuration examples in the links below which you may use to determine if you are vulnerable to this issue or not. If the commands work, you are. If not, you are not. You may also use the Feature Explorer to determine if AFI/AFT is supported or not. If you are still uncertain, please contact your support resources."}, {"lang": "es", "value": "Este problema se presenta en los dispositivos Juniper Networks Junos OS que no admiten Advanced Forwarding Interface (AFI) / Advanced Forwarding Toolkit (AFT). Los dispositivos que usan AFI y AFT no son explotables para este problema. Una inicializaci\u00f3n incorrecta de la memoria en la arquitectura de reenv\u00edo de paquetes en plataformas Juniper Networks Junos OS sin AFI/AFT que puede conllevar a una vulnerabilidad de Denegaci\u00f3n de Servicio (DoS) siendo explotada cuando un paquete genuino es recibido e inspeccionado por sFlow sin AFT/AFI y cuando el dispositivo tambi\u00e9n est\u00e1 configurado con pol\u00edticas de firewall. Este primer paquete genuino recibido e inspeccionado por el flujo muestreado (sFlow) por medio de un firewall espec\u00edfico causar\u00e1 que el dispositivo se reinicie. Una vez que el reinicio ha sido completado, si el dispositivo recibe y sFlow inspecciona otro paquete genuino visto por medio de un controlador de firewall espec\u00edfico, el dispositivo generar\u00e1 un archivo principal y se reiniciar\u00e1. La inspecci\u00f3n continua de estos paquetes genuinos crear\u00e1 una condici\u00f3n de Denegaci\u00f3n de Servicio (DoS) extendida. Dependiendo del m\u00e9todo para la restauraci\u00f3n del servicio, por ejemplo, arranque duro o reinicio suave, un archivo principal puede o no ser generado la pr\u00f3xima vez que sFlow reciba e inspeccione el paquete. Este problema afecta a: Juniper Networks Junos OS versiones 17.4 anteriores a 17.4R2-S9, 17.4R3 en PTX1000 y PTX10000 Series, QFX10000 Series; versiones 18.1 anteriores a 18.1R3-S9 en PTX1000 y PTX10000 Series, QFX10000 Series; versiones 18.2X75 anteriores a 18.2X75-D12, 18.2X75-D30 en PTX1000 y PTX10000 Series, QFX10000 Series; versiones 18.2 anteriores a 18.2R3 en PTX1000 y PTX10000 Series, QFX10000 Series; versiones 18.3 anteriores a 18.3R3 en PTX1000 y PTX10000 Series, QFX10000 Series. Este problema no es aplicable a Junos OS versiones anteriores a 17.4R1. Este problema no es aplicable a Junos OS Evolved o Junos OS con las implementaciones de reenv\u00edo de Advanced Forwarding Toolkit (AFT) que usan una implementaci\u00f3n diferente de sFlow. La siguiente informaci\u00f3n de ejemplo no est\u00e1 relacionada con este problema y se proporciona \u00fanicamente para ayudarle a determinar si posee AFT o no. Ejemplo: un dispositivo con Junos OS que admite el uso de VPWS se\u00f1alado con EVPN con Flexible Cross Connect usa la implementaci\u00f3n AFT. Dado que esta configuraci\u00f3n requiere soporte y uso de la implementaci\u00f3n AFT para soportar esta configuraci\u00f3n, el dispositivo no es vulnerable a este problema ya que la implementaci\u00f3n sFlow es diferente utilizando la arquitectura AFT. Para obtener m\u00e1s detalles sobre AFT visite AFI / AFT en los enlaces a continuaci\u00f3n. Si no est\u00e1 seguro de si usa la implementaci\u00f3n AFI/AFT o no, existen ejemplos de configuraci\u00f3n en los enlaces a continuaci\u00f3n que puede usar para determinar si es vulnerable a este problema o no. Si los comandos funcionan, lo eres. Si no, no lo eres. Tambi\u00e9n puede usar el Feature Explorer para determinar si AFI/AFT es compatible o no. Si todav\u00eda no est\u00e1 seguro, p\u00f3ngase contacte con sus recursos de soporte."}], "id": "CVE-2020-1617", "lastModified": "2024-11-21T05:11:00.413", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.8, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.9, "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": "Secondary"}, {"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"}]}, "published": "2020-04-08T20:15:13.323", "references": [{"source": "sirt@juniper.net", "tags": ["Third Party Advisory"], "url": "https://github.com/Juniper/AFI"}, {"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11000"}, {"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://www.juniper.net/documentation/en_US/junos/topics/example/example-configuring-vpws-service-with-evpn-signaling-mechanisms.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/Juniper/AFI"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11000"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.juniper.net/documentation/en_US/junos/topics/example/example-configuring-vpws-service-with-evpn-signaling-mechanisms.html"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-665"}], "source": "sirt@juniper.net", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-665"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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