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CVE-2025-66043

Estado: AnalizadaCrítica (9.8)—

Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.1. A specially crafted MFER file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger these vulnerabilities.When Tag is 3

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.

AV:N sin autenticación ni interacción (UI:N) = T1190. Stack overflow en parsing MFER permite ejecución arbitraria de código (CWE-787). Confianza alta: vector crítico y vulnerabilidad de desbordamiento explícita.

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)

Libbiosig Project — Libbiosig

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-66043",
  "cveTags": [],
  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "poc"
            },
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              "automatable": "yes"
            },
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            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-12-11T19:20:40.451507Z"
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          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
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  },
  "affected": [
    {
      "source": "talos-cna@cisco.com",
      "affectedData": [
        {
          "vendor": "The Biosig Project",
          "product": "libbiosig",
          "versions": [
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            }
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        }
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  ],
  "published": "2025-12-11T17:15:58.233",
  "references": [
    {
      "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2025-2296",
      "tags": [
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        "Third Party Advisory"
      ],
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    },
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  "vulnStatus": "Analyzed",
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    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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  "descriptions": [
    {
      "lang": "en",
      "value": "Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.1. A specially crafted MFER file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger these vulnerabilities.When Tag is 3"
    }
  ],
  "lastModified": "2026-06-17T09:56:13.867",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:libbiosig_project:libbiosig:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "3.9.2"
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          "operator": "OR"
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  "sourceIdentifier": "talos-cna@cisco.com"
}