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CVE-2009-3942

Estado: ModificadaMedia (6.4)—

Martin Lambers msmtp before 1.4.19, when OpenSSL is used, does not properly handle a '\0' character in a domain name in the (1) subject's Common Name or (2) Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

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)

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2009-3942",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "baseScore": 6.4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
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  "affected": [
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      "affectedData": [
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  "published": "2009-11-16T19:30:01.077",
  "references": [
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      "value": "Martin Lambers msmtp before 1.4.19, when OpenSSL is used, does not properly handle a '\\0' character in a domain name in the (1) subject's Common Name or (2) Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408."
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      "lang": "es",
      "value": "Martin Lambers msmtp versiones anteriores a v1.4.19, cuando usa OpenSSL, no maneja adecuadamente un carácter '\\0' en un nombre de dominio (1) en el campo nombre común del sujeto o (2) en el campo nombre alternativo del sujeto de un certificado X.509, permitiendo que atacantes de hombre en medio (man-in-the-middle) suplantar a servidores SSL de su elección mediante un certificado modificado emitido por una Autoridad de Certificación legítima, estando relacionado con el CVE-2009-2408."
    }
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  "lastModified": "2026-06-16T23:12:40.363",
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