cve-2020-1603
Vulnerability from cvelistv5
Published
2020-01-15 08:40
Modified
2024-09-16 22:36
Severity ?
8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Summary
Junos OS: Improper handling of specific IPv6 packets sent by clients eventually kernel crash (vmcore) the device.
References
sirt@juniper.nethttps://kb.juniper.net/JSA10982Vendor Advisory
sirt@juniper.nethttps://prsearch.juniper.net/InfoCenter/index?page=prcontent&id=PR1443576Permissions Required
Impacted products
Juniper NetworksJunos OS
Show details on NVD website

To clipboard 

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          "value": "Specific IPv6 packets sent by clients processed by the Routing Engine (RE) are improperly handled. These IPv6 packets are designed to be blocked by the RE from egressing the RE. Instead, the RE allows these specific IPv6 packets to egress the RE, at which point a mbuf memory leak occurs within the Juniper Networks Junos OS device. This memory leak eventually leads to a kernel crash (vmcore), or the device hanging and requiring a power cycle to restore service, creating a Denial of Service (DoS) condition. During the time where mbufs are rising, yet not fully filled, some traffic from client devices may begin to be black holed. To be black holed, this traffic must match the condition where this traffic must be processed by the RE. Continued receipt and attempted egress of these specific IPv6 packets from the Routing Engine (RE) will create an extended Denial of Service (DoS) condition. Scenarios which have been observed are: 1. In a single chassis, single RE scenario, the device will hang without vmcore, or a vmcore may occur and then hang. In this scenario the device needs to be power cycled. 2. In a single chassis, dual RE scenario, the device master RE will fail over to the backup RE. In this scenario, the master and the backup REs need to be reset from time to time when they vmcore. There is no need to power cycle the device. 3. In a dual chassis, single RE scenario, the device will hang without vmcore, or a vmcore may occur and then hang. In this scenario, the two chassis\u0027 design relies upon some type of network level redundancy - VRRP, GRES, NSR, etc. - 3.a In a commanded switchover, where nonstop active routing (NSR) is enabled no session loss is observed. 4. In a dual chassis, dual chassis scenario, rely upon the RE to RE failover as stated in the second scenario. In the unlikely event that the device does not switch RE to RE gracefully, then the fallback position is to the network level services scenario in the third scenario. This issue affects: Juniper Networks Junos OS 16.1 versions prior to 16.1R7-S6; 16.1 version 16.1X70-D10 and later; 16.2 versions prior to 16.2R2-S11; 17.1 versions prior to 17.1R2-S11, 17.1R3-S1; 17.2 versions prior to 17.2R1-S9, 17.2R2-S8, 17.2R3-S3; 17.3 versions prior to 17.3R3-S6; 17.4 versions prior to 17.4R2-S9, 17.4R3; 18.1 versions prior to 18.1R3-S7; 18.2 versions prior to 18.2R3-S2; 18.2X75 versions prior to 18.2X75-D50, 18.2X75-D410; 18.3 versions prior to 18.3R1-S6, 18.3R2-S2, 18.3R3; 18.4 versions prior to 18.4R1-S6, 18.4R2-S2, 18.4R3; 19.1 versions prior to 19.1R1-S3, 19.1R2; 19.2 versions prior to 19.2R1-S2, 19.2R2. This issue does not affect releases prior to Junos OS 16.1R1."
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      "title": "Junos OS: Improper handling of specific IPv6 packets sent by clients eventually kernel crash (vmcore) the device.",
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          "value": "Remove \u0027family inet6\u0027 from interfaces. Otherwise, there are no available workarounds for this issue.\n\nIndicators of compromise can be found by reviewing RE logs for entries which match in \" \" :\n\"/kernel: Mbuf: High Utililization Level\"\n\nAdditionally, you may issue the follow command from time to time to determine if your mbufs are climbing or are being released by reviewing across two separate times.\n\nThe required privilege level to run the command is: view.\nshow system buffers"
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          "DATE_PUBLIC": "2020-01-08T17:00:00.000Z",
          "ID": "CVE-2020-1603",
          "STATE": "PUBLIC",
          "TITLE": "Junos OS: Improper handling of specific IPv6 packets sent by clients eventually kernel crash (vmcore) the device."
        },
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        "description": {
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              "value": "Specific IPv6 packets sent by clients processed by the Routing Engine (RE) are improperly handled. These IPv6 packets are designed to be blocked by the RE from egressing the RE. Instead, the RE allows these specific IPv6 packets to egress the RE, at which point a mbuf memory leak occurs within the Juniper Networks Junos OS device. This memory leak eventually leads to a kernel crash (vmcore), or the device hanging and requiring a power cycle to restore service, creating a Denial of Service (DoS) condition. During the time where mbufs are rising, yet not fully filled, some traffic from client devices may begin to be black holed. To be black holed, this traffic must match the condition where this traffic must be processed by the RE. Continued receipt and attempted egress of these specific IPv6 packets from the Routing Engine (RE) will create an extended Denial of Service (DoS) condition. Scenarios which have been observed are: 1. In a single chassis, single RE scenario, the device will hang without vmcore, or a vmcore may occur and then hang. In this scenario the device needs to be power cycled. 2. In a single chassis, dual RE scenario, the device master RE will fail over to the backup RE. In this scenario, the master and the backup REs need to be reset from time to time when they vmcore. There is no need to power cycle the device. 3. In a dual chassis, single RE scenario, the device will hang without vmcore, or a vmcore may occur and then hang. In this scenario, the two chassis\u0027 design relies upon some type of network level redundancy - VRRP, GRES, NSR, etc. - 3.a In a commanded switchover, where nonstop active routing (NSR) is enabled no session loss is observed. 4. In a dual chassis, dual chassis scenario, rely upon the RE to RE failover as stated in the second scenario. In the unlikely event that the device does not switch RE to RE gracefully, then the fallback position is to the network level services scenario in the third scenario. This issue affects: Juniper Networks Junos OS 16.1 versions prior to 16.1R7-S6; 16.1 version 16.1X70-D10 and later; 16.2 versions prior to 16.2R2-S11; 17.1 versions prior to 17.1R2-S11, 17.1R3-S1; 17.2 versions prior to 17.2R1-S9, 17.2R2-S8, 17.2R3-S3; 17.3 versions prior to 17.3R3-S6; 17.4 versions prior to 17.4R2-S9, 17.4R3; 18.1 versions prior to 18.1R3-S7; 18.2 versions prior to 18.2R3-S2; 18.2X75 versions prior to 18.2X75-D50, 18.2X75-D410; 18.3 versions prior to 18.3R1-S6, 18.3R2-S2, 18.3R3; 18.4 versions prior to 18.4R1-S6, 18.4R2-S2, 18.4R3; 19.1 versions prior to 19.1R1-S3, 19.1R2; 19.2 versions prior to 19.2R1-S2, 19.2R2. This issue does not affect releases prior to Junos OS 16.1R1."
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            "scope": "CHANGED",
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            "lang": "en",
            "value": "Remove \u0027family inet6\u0027 from interfaces. Otherwise, there are no available workarounds for this issue.\n\nIndicators of compromise can be found by reviewing RE logs for entries which match in \" \" :\n\"/kernel: Mbuf: High Utililization Level\"\n\nAdditionally, you may issue the follow command from time to time to determine if your mbufs are climbing or are being released by reviewing across two separate times.\n\nThe required privilege level to run the command is: view.\nshow system buffers"
          }
        ]
      }
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  "cveMetadata": {
    "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
    "assignerShortName": "juniper",
    "cveId": "CVE-2020-1603",
    "datePublished": "2020-01-15T08:40:35.364131Z",
    "dateReserved": "2019-11-04T00:00:00",
    "dateUpdated": "2024-09-16T22:36:38.862Z",
    "state": "PUBLISHED"
  },
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  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2020-1603\",\"sourceIdentifier\":\"sirt@juniper.net\",\"published\":\"2020-01-15T09:15:12.093\",\"lastModified\":\"2021-09-14T13:21:26.593\",\"vulnStatus\":\"Analyzed\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"Specific IPv6 packets sent by clients processed by the Routing Engine (RE) are improperly handled. These IPv6 packets are designed to be blocked by the RE from egressing the RE. Instead, the RE allows these specific IPv6 packets to egress the RE, at which point a mbuf memory leak occurs within the Juniper Networks Junos OS device. This memory leak eventually leads to a kernel crash (vmcore), or the device hanging and requiring a power cycle to restore service, creating a Denial of Service (DoS) condition. During the time where mbufs are rising, yet not fully filled, some traffic from client devices may begin to be black holed. To be black holed, this traffic must match the condition where this traffic must be processed by the RE. Continued receipt and attempted egress of these specific IPv6 packets from the Routing Engine (RE) will create an extended Denial of Service (DoS) condition. Scenarios which have been observed are: 1. In a single chassis, single RE scenario, the device will hang without vmcore, or a vmcore may occur and then hang. In this scenario the device needs to be power cycled. 2. In a single chassis, dual RE scenario, the device master RE will fail over to the backup RE. In this scenario, the master and the backup REs need to be reset from time to time when they vmcore. There is no need to power cycle the device. 3. In a dual chassis, single RE scenario, the device will hang without vmcore, or a vmcore may occur and then hang. In this scenario, the two chassis\u0027 design relies upon some type of network level redundancy - VRRP, GRES, NSR, etc. - 3.a In a commanded switchover, where nonstop active routing (NSR) is enabled no session loss is observed. 4. In a dual chassis, dual chassis scenario, rely upon the RE to RE failover as stated in the second scenario. In the unlikely event that the device does not switch RE to RE gracefully, then the fallback position is to the network level services scenario in the third scenario. This issue affects: Juniper Networks Junos OS 16.1 versions prior to 16.1R7-S6; 16.1 version 16.1X70-D10 and later; 16.2 versions prior to 16.2R2-S11; 17.1 versions prior to 17.1R2-S11, 17.1R3-S1; 17.2 versions prior to 17.2R1-S9, 17.2R2-S8, 17.2R3-S3; 17.3 versions prior to 17.3R3-S6; 17.4 versions prior to 17.4R2-S9, 17.4R3; 18.1 versions prior to 18.1R3-S7; 18.2 versions prior to 18.2R3-S2; 18.2X75 versions prior to 18.2X75-D50, 18.2X75-D410; 18.3 versions prior to 18.3R1-S6, 18.3R2-S2, 18.3R3; 18.4 versions prior to 18.4R1-S6, 18.4R2-S2, 18.4R3; 19.1 versions prior to 19.1R1-S3, 19.1R2; 19.2 versions prior to 19.2R1-S2, 19.2R2. This issue does not affect releases prior to Junos OS 16.1R1.\"},{\"lang\":\"es\",\"value\":\"Los paquetes espec\u00edficos de IPv6 enviados por parte de clientes procesados por el Routing Engine (RE) son manejados inapropiadamente. Estos paquetes IPv6 est\u00e1n dise\u00f1ados para ser bloqueados por el RE bloquee desde la salida del RE. En cambio, el RE permite que estos paquetes espec\u00edficos de IPv6 salgan del RE, en cuyo momento se produce una p\u00e9rdida de memoria del mbuf dentro del dispositivo de Juniper Networks Junos OS. Esta p\u00e9rdida de memoria eventualmente conlleva a un bloqueo del kernel (vmcore), o el dispositivo se cuelga y requiere un ciclo de energ\u00eda para restaurar el servicio, creando una condici\u00f3n de Denegaci\u00f3n de Servicio (DoS). Durante el tiempo en que los mbufs aumentan, pero no est\u00e1n completamente llenos, parte del tr\u00e1fico de los dispositivos de los clientes puede comenzar a quedar negro. Para quedar de color negro, este tr\u00e1fico debe coincidir con la condici\u00f3n donde este tr\u00e1fico debe ser procesado por el RE. La recepci\u00f3n continua y el intento de salida de estos paquetes espec\u00edficos de IPv6 del Routing Engine (RE) crear\u00e1 una condici\u00f3n extendida de Denegaci\u00f3n de Servicio (DoS). Los escenarios que se han observado son: 1. En un solo chasis, un solo escenario de RE, el dispositivo se colgar\u00e1 sin vmcore, o puede ocurrir un vmcore y luego colgarse. En este escenario, el dispositivo necesita un ciclo de energ\u00eda. 2. En un solo chasis, escenario de doble RE, el dispositivo RE maestro fallar\u00e1 sobre el RE de respaldo. En este escenario, el RE maestro y el RE de respaldo necesitan reiniciarse de vez en cuando ejecuten vmcore. No es necesario encender y apagar el dispositivo. 3. En un escenario de doble chasis, escenario de RE \u00fanico, el dispositivo se colgar\u00e1 sin vmcore, o puede ocurrir un vmcore y luego colgarse. En este escenario, el dise\u00f1o de los dos chasis se fundamenta en alg\u00fan tipo de redundancia a nivel de red: VRRP, GRES, NSR, etc. - 3.a En una conmutaci\u00f3n ordenada, donde el enrutamiento activo sin interrupci\u00f3n (NSR) est\u00e1 habilitado, no se observa p\u00e9rdida de sesi\u00f3n. 4. En un escenario de doble chasis, doble chasis, conf\u00ede en la conmutaci\u00f3n por error RE a RE como es indicado en el segundo escenario. En el caso improbable de que el dispositivo no cambie RE a RE con gracia, la posici\u00f3n alternativa es el escenario de servicios de nivel de red en el tercer escenario. Este problema afecta a: Juniper Networks Junos OS versiones 16.1 anteriores a 16.1R7-S6; versiones 16.1 hasta 16.1X70-D10 y posterior; versiones 16.2 anteriores a 16.2R2-S11; versiones17.1 anteriores a 17.1R2-S11, 17.1R3-S1; versiones 17.2 anteriores a 17.2R1-S9, 17.2R2-S8, 17.2R3-S3; versiones 17.3 anteriores a 17.3R3-S6; versiones 17.4 anteriores a 17.4R2-S9, 17.4R3; versiones 18.1 anteriores a 18.1R3-S7; versiones 18.2 anteriores a 18.2R3-S2; versiones 18.2X75 anteriores a 18.2X75-D50, 18.2X75-D410; versiones 18.3 anteriores a 18.3R1-S6, 18.3R2-S2, 18.3R3; versiones 18.4 anteriores a 18.4R1-S6, 18.4R2-S2, 18.4R3; versiones 19.1 anteriores a 19.1R1-S3, 19.1R2; versiones 19.2 anteriores a 19.2R1-S2, 19.2R2. Este problema no afecta a Junos OS versiones anteriores a 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Advisory\"]},{\"url\":\"https://prsearch.juniper.net/InfoCenter/index?page=prcontent\u0026id=PR1443576\",\"source\":\"sirt@juniper.net\",\"tags\":[\"Permissions Required\"]}]}}"
  }
}


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