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CVE-2020-11931

Estado: ModificadaBaja (3.3)—
Detalles técnicos trazas, registros y código del informe original
An Ubuntu-specific modification to Pulseaudio to provide security mediation for Snap-packaged applications was found to have a bypass of intended access restriction for snaps which plugs any of pulseaudio, audio-playback or audio-record via unloading the pulseaudio snap policy module. This issue affects: pulseaudio 1:8.0 versions prior to 1:8.0-0ubuntu3.12; 1:11.1 versions prior to 1:11.1-1ubuntu7.7; 1:13.0 versions prior to 1:13.0-1ubuntu1.2; 1:13.99.1 versions prior to 1:13.99.1-1ubuntu3.2;

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 (2)

Canonical — Ubuntu LinuxPulseaudio — Pulseaudio

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2020-11931",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 2.1,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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    "cvssMetricV31": [
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 3.3,
          "attackVector": "LOCAL",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 1.8
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        "source": "nvd@nist.gov",
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          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
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  "affected": [
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      "affectedData": [
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          "vendor": "Canonical",
          "product": "pulseaudio",
          "versions": [
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              "status": "affected",
              "version": "1:8.0",
              "lessThan": "1:8.0-0ubuntu3.12",
              "versionType": "custom"
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            {
              "status": "affected",
              "version": "1:11.1",
              "lessThan": "1:11.1-1ubuntu7.7",
              "versionType": "custom"
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            {
              "status": "affected",
              "version": "1:13.0",
              "lessThan": "1:13.0-1ubuntu1.2",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "1:13.99.1",
              "lessThan": "1:13.99.1-1ubuntu3.2",
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            }
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  ],
  "published": "2020-05-15T04:15:10.737",
  "references": [
    {
      "url": "https://forum.snapcraft.io/t/audio-switcher-pulseaudio-interface-auto-connect-request/16648/3",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security@ubuntu.com"
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    {
      "url": "https://usn.ubuntu.com/4355-1/",
      "tags": [
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      "source": "security@ubuntu.com"
    },
    {
      "url": "https://forum.snapcraft.io/t/audio-switcher-pulseaudio-interface-auto-connect-request/16648/3",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://usn.ubuntu.com/4355-1/",
      "tags": [
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@ubuntu.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-668"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An Ubuntu-specific modification to Pulseaudio to provide security mediation for Snap-packaged applications was found to have a bypass of intended access restriction for snaps which plugs any of pulseaudio, audio-playback or audio-record via unloading the pulseaudio snap policy module. This issue affects: pulseaudio 1:8.0 versions prior to 1:8.0-0ubuntu3.12; 1:11.1 versions prior to 1:11.1-1ubuntu7.7; 1:13.0 versions prior to 1:13.0-1ubuntu1.2; 1:13.99.1 versions prior to 1:13.99.1-1ubuntu3.2;"
    },
    {
      "lang": "es",
      "value": "Una modificación específica de Ubuntu para Pulseaudio para proporcionar mediación de seguridad para aplicaciones empaquetadas de Snap se encontró que presenta una omisión de la restricción de acceso prevista para los snaps que conecta cualquiera pulseaudio, audio-playback o audio-record mediante la descarga del módulo de la política de snap de pulseaudio. Este problema afecta a: pulseaudio versiones 1:8.0 anteriores a 1:8.0-0ubuntu3.12; versiones 1:11.1 anteriores a 1:11.1-1ubuntu7.7; versiones 1:13.0 anteriores a 1:13.0-1ubuntu1.2; versiones 1:13.99.1 anteriores a 1:13.99.1-1ubuntu3.2;"
    }
  ],
  "lastModified": "2026-06-17T02:51:04.790",
  "configurations": [
    {
      "nodes": [
        {
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              "versionEndIncluding": "1.8.0"
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}