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CVE-2019-9855

Estado: ModificadaCrítica (9.8)—

LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can execute arbitrary python commands contained with the document it is launched from. LibreOffice also has a feature where documents can specify that pre-installed scripts can be executed on various document script events such as mouse-over, etc. Protection was added to block calling LibreLogo from script event handers. However a Windows 8.3 path equivalence handling flaw left LibreOffice vulnerable under Windows that a document could trigger executing LibreLogo via a Windows filename pseudonym. This issue affects: Document Foundation LibreOffice 6.2 versions prior to 6.2.7; 6.3 versions prior to 6.3.1.

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)

Libreoffice — LibreofficeOpensuse — Leap

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2019-9855",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
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  },
  "affected": [
    {
      "source": "security@documentfoundation.org",
      "affectedData": [
        {
          "vendor": "Document Foundation",
          "product": "LibreOffice",
          "versions": [
            {
              "status": "affected",
              "version": "6.2",
              "lessThan": "6.2.7",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "6.3",
              "lessThan": "6.3.1",
              "versionType": "custom"
            }
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  "published": "2019-09-06T19:15:12.073",
  "references": [
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      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00067.html",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "security@documentfoundation.org"
    },
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      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00055.html",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
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      "source": "security@documentfoundation.org"
    },
    {
      "url": "https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9855/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@documentfoundation.org"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00067.html",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00055.html",
      "tags": [
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        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.libreoffice.org/about-us/security/advisories/CVE-2019-9855/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-417"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can execute arbitrary python commands contained with the document it is launched from. LibreOffice also has a feature where documents can specify that pre-installed scripts can be executed on various document script events such as mouse-over, etc. Protection was added to block calling LibreLogo from script event handers. However a Windows 8.3 path equivalence handling flaw left LibreOffice vulnerable under Windows that a document could trigger executing LibreLogo via a Windows filename pseudonym. This issue affects: Document Foundation LibreOffice 6.2 versions prior to 6.2.7; 6.3 versions prior to 6.3.1."
    },
    {
      "lang": "es",
      "value": "LibreOffice es comúnmente paquetizado con LibreLogo, un script de gráficos vectoriales turtle programable, que puede ejecutar comandos de python arbitrarios contenidos con el documento desde que es activado. LibreOffice también presenta una funcionalidad en la que los documentos pueden especificar que los scripts preinstalados pueden ser ejecutados en varios eventos de script de documentos, tales como mouse-over, etc. La protección fue agregada para bloquear la llamada a LibreLogo desde los manejadores de eventos de script. Sin embargo, un fallo en el manejo de la equivalencia de ruta de Windows versión 8.3 dejó a LibreOffice vulnerable bajo Windows que un documento podría desencadenar la ejecución de LibreLogo por medio del seudónimo del nombre de archivo de Windows. Este problema afecta a: Document Foundation LibreOffice versiones 6.2 anteriores a 6.2.7; versiones 6.3 anteriores a 6.3.1."
    }
  ],
  "lastModified": "2026-06-17T02:44:44.023",
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