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CVE-2018-20450

Estado: ModificadaMedia (6.5)—

The read_MSAT function in ole.c in libxls 1.4.0 has a double free that allows attackers to cause a denial of service (application crash) via a crafted file, a different vulnerability than CVE-2017-2897.

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)

Libxls Project — Libxls

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2018-20450",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
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    "cvssMetricV30": [
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        "cvssData": {
          "scope": "UNCHANGED",
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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        "impactScore": 3.6,
        "exploitabilityScore": 2.8
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  "affected": [
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      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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              "status": "affected",
              "version": "n/a"
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  "published": "2018-12-25T17:29:00.250",
  "references": [
    {
      "url": "https://github.com/evanmiller/libxls/issues/34",
      "tags": [
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        "Issue Tracking",
        "Third Party Advisory"
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      "source": "cve@mitre.org"
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      "url": "https://security.gentoo.org/glsa/202003-64",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/evanmiller/libxls/issues/34",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-415"
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  "descriptions": [
    {
      "lang": "en",
      "value": "The read_MSAT function in ole.c in libxls 1.4.0 has a double free that allows attackers to cause a denial of service (application crash) via a crafted file, a different vulnerability than CVE-2017-2897."
    },
    {
      "lang": "es",
      "value": "La función read_MSAT en ole.c en libxls, hasta la versión 1.4.0, tiene una doble liberación (double free) que permite que los atacantes provoquen una denegación de servicio (cierre inesperado de la aplicación) mediante un archivo manipulado. Esta vulnerabilidad es diferente de CVE-2017-2897."
    }
  ],
  "lastModified": "2026-06-17T01:52:51.950",
  "configurations": [
    {
      "nodes": [
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          "cpeMatch": [
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  "sourceIdentifier": "cve@mitre.org"
}