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CVE-2020-37239

Estado: AplazadaCrítica (9.3)—

libbabl 0.1.62 contains a broken double free detection vulnerability that allows attackers to bypass memory safety checks by exploiting signature overwriting in freed chunks. Attackers can call babl_free() twice on the same pointer without triggering detection, as libc's malloc metadata overwrites babl's signature field upon freeing, enabling potential memory corruption and code execution.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Double free vulnerability (CWE-415) en librería remota sin autenticación (AV:N/PR:N) permite ejecución de código arbitrary mediante corrupción de memoria al bypass de defensas de seguridad.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementVulnerability ScanningRestrict Web-Based ContentNetwork SegmentationLimit Software InstallationLimit Access to Resource Over Network

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Libbabl — LibbablAI

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2020-37239",
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2020-37239",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
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          "version": "2.0.3",
          "timestamp": "2026-05-18T18:08:37.285737Z"
        }
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    "cvssMetricV31": [
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          "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"
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      }
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        "cvssData": {
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          "Recovery": "NOT_DEFINED",
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          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
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          "valueDensity": "NOT_DEFINED",
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  "affected": [
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      "affectedData": [
        {
          "vendor": "Gegl",
          "product": "libbabl",
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            {
              "status": "affected",
              "version": "0.1.62"
            }
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  ],
  "published": "2026-05-16T16:16:20.097",
  "references": [
    {
      "url": "https://www.exploit-db.com/exploits/49259",
      "source": "disclosure@vulncheck.com"
    },
    {
      "url": "https://www.gegl.org",
      "source": "disclosure@vulncheck.com"
    },
    {
      "url": "https://www.gegl.org/babl/",
      "source": "disclosure@vulncheck.com"
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    {
      "url": "https://www.vulncheck.com/advisories/libbabl-broken-double-free-detection-memory-safety",
      "source": "disclosure@vulncheck.com"
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  "vulnStatus": "Deferred",
  "weaknesses": [
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      "description": [
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          "value": "CWE-415"
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    {
      "lang": "en",
      "value": "libbabl 0.1.62 contains a broken double free detection vulnerability that allows attackers to bypass memory safety checks by exploiting signature overwriting in freed chunks. Attackers can call babl_free() twice on the same pointer without triggering detection, as libc's malloc metadata overwrites babl's signature field upon freeing, enabling potential memory corruption and code execution."
    },
    {
      "lang": "es",
      "value": "libbabl 0.1.62 contiene una vulnerabilidad de detección de doble liberación fallida que permite a los atacantes eludir las comprobaciones de seguridad de la memoria explotando la sobrescritura de firmas en bloques liberados. Los atacantes pueden llamar a babl_free() dos veces sobre el mismo puntero sin activar la detección, ya que los metadatos de malloc de libc sobrescriben el campo de firma de babl al liberar, lo que permite una potencial corrupción de memoria y ejecución de código."
    }
  ],
  "lastModified": "2026-09-29T10:10:00.263",
  "sourceIdentifier": "disclosure@vulncheck.com"
}