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CVE-2020-1645

Estado: ModificadaAlta (8.3)—

Cuando el filtrado de DNS está habilitado en Juniper Networks Junos MX Series con una de las siguientes tarjetas MS-PIC, MS-MIC o MS-MPC, un flujo entrante de paquetes procesados ??por el proceso Multiservices PIC Management Daemon (mspmand), responsable de administrar "URL Filtering service", puede bloquearse y causar que se reinicie el PIC de Servicios. Mientras se reinicia el PIC de Servicios, todos los servicios de PIC, incluyendo el servicio de filtrado de DNS (DNS sink holing) serán omitidos hasta que el PIC de Servicios complete su proceso de arranque.

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Si se produce el problema, la salida core-dumps del sistema mostrará un bloqueo del proceso mspmand: root@device) show system core-dumps -rw-rw---- 1 nobody wheel 575685123 (Date) /var/tmp/pics/mspmand.core.(*).gz. Este problema afecta a Juniper Networks Junos OS: versiones 17.3 anteriores a 17.3R3-S8; versiones 18.3 anteriores a 18.3R2-S4, 18.3R3-S1; versiones 18.4 anteriores a 18.4R2-S5, 18.4R3; versiones 19.1 anteriores a 19.1R2-S2, 19.1R3; versiones 19.2 anteriores a 19.2R1-S5, 19.2R2; versiones 19.3 anteriores a 19.3R2-S3, 19.3R3; versiones 19.4 anteriores a 19.4R1-S3, 19.4R2. Este problema no afecta a Juniper Networks Junos OS versiones anteriores a 17.3R2

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Juniper — Junos

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-1645",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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        "type": "Secondary",
        "source": "sirt@juniper.net",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 8.3,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 3.7,
        "exploitabilityScore": 3.9
      },
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
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          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
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        "impactScore": 3.7,
        "exploitabilityScore": 3.9
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  "affected": [
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      "source": "sirt@juniper.net",
      "affectedData": [
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          "vendor": "Juniper Networks",
          "product": "Junos OS",
          "versions": [
            {
              "status": "unaffected",
              "version": "unspecified",
              "lessThan": "17.3R2",
              "versionType": "custom"
            },
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              "status": "unaffected",
              "version": "17.4"
            },
            {
              "status": "unaffected",
              "version": "18.1"
            },
            {
              "status": "unaffected",
              "version": "18.2"
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              "version": "17.3",
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            {
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              "version": "18.4",
              "lessThan": "18.4R2-S5, 18.4R3",
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            },
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              "version": "19.1",
              "lessThan": "19.1R2-S2, 19.1R3",
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            },
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              "status": "affected",
              "version": "19.2",
              "lessThan": "19.2R1-S5, 19.2R2",
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            },
            {
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              "version": "19.3",
              "lessThan": "19.3R2-S3, 19.3R3",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "19.4",
              "lessThan": "19.4R1-S3, 19.4R2",
              "versionType": "custom"
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          "platforms": [
            "MX Series"
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  ],
  "published": "2020-07-17T19:15:12.970",
  "references": [
    {
      "url": "https://kb.juniper.net/JSA11028",
      "tags": [
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      "source": "sirt@juniper.net"
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      "tags": [
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "sirt@juniper.net",
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
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      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "When DNS filtering is enabled on Juniper Networks Junos MX Series with one of the following cards MS-PIC, MS-MIC or MS-MPC, an incoming stream of packets processed by the Multiservices PIC Management Daemon (mspmand) process, responsible for managing \"URL Filtering service\", may crash, causing the Services PIC to restart. While the Services PIC is restarting, all PIC services including DNS filtering service (DNS sink holing) will be bypassed until the Services PIC completes its boot process. If the issue occurs, system core-dumps output will show a crash of mspmand process: root@device> show system core-dumps -rw-rw---- 1 nobody wheel 575685123 <Date> /var/tmp/pics/mspmand.core.<*>.gz This issue affects Juniper Networks Junos OS: 17.3 versions prior to 17.3R3-S8; 18.3 versions prior to 18.3R2-S4, 18.3R3-S1; 18.4 versions prior to 18.4R2-S5, 18.4R3; 19.1 versions prior to 19.1R2-S2, 19.1R3; 19.2 versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2-S3, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2. This issue does not affect Juniper Networks Junos OS releases prior to 17.3R2."
    },
    {
      "lang": "es",
      "value": "Cuando el filtrado de DNS está habilitado en Juniper Networks Junos MX Series con una de las siguientes tarjetas MS-PIC, MS-MIC o MS-MPC, un flujo entrante de paquetes procesados ??por el proceso Multiservices PIC Management Daemon (mspmand), responsable de administrar \"URL Filtering service\", puede bloquearse y causar que se reinicie el PIC de Servicios. Mientras se reinicia el PIC de Servicios, todos los servicios de PIC, incluyendo el servicio de filtrado de DNS (DNS sink holing) serán omitidos hasta que el PIC de Servicios complete su proceso de arranque. Si se produce el problema, la salida core-dumps del sistema mostrará un bloqueo del proceso mspmand: root@device) show system core-dumps -rw-rw---- 1 nobody wheel 575685123 (Date) /var/tmp/pics/mspmand.core.(*).gz. Este problema afecta a Juniper Networks Junos OS: versiones 17.3 anteriores a 17.3R3-S8; versiones 18.3 anteriores a 18.3R2-S4, 18.3R3-S1; versiones 18.4 anteriores a 18.4R2-S5, 18.4R3; versiones 19.1 anteriores a 19.1R2-S2, 19.1R3; versiones 19.2 anteriores a 19.2R1-S5, 19.2R2; versiones 19.3 anteriores a 19.3R2-S3, 19.3R3; versiones 19.4 anteriores a 19.4R1-S3, 19.4R2. Este problema no afecta a Juniper Networks Junos OS versiones anteriores a 17.3R2"
    }
  ],
  "lastModified": "2026-06-17T03:02:06.223",
  "configurations": [
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