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CVE-2021-3935

Estado: ModificadaAlta (8.1)—

Cuando PgBouncer está configurado para usar la autenticación "cert", un atacante de tipo "man-in-the-middle" puede inyectar consultas SQL arbitrarias cuando se establece una conexión por primera vez, a pesar del uso de la verificación y el cifrado de certificados TLS. Este fallo afecta a PgBouncer versiones anteriores a 1.16.1

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 (4)

Debian — Debian LinuxFedoraproject — FedoraPgbouncer — PgbouncerRedhat — Enterprise Linux

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2021-3935",
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          "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "HIGH",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
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        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
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          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
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  "affected": [
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      "affectedData": [
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          "vendor": "n/a",
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  "published": "2021-11-22T16:15:07.440",
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      "url": "http://www.pgbouncer.org/changelog.html#pgbouncer-116x",
      "tags": [
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        "Vendor Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Secondary",
      "source": "patrick@puiterwijk.org",
      "description": [
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          "lang": "en",
          "value": "CWE-89"
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "When PgBouncer is configured to use \"cert\" authentication, a man-in-the-middle attacker can inject arbitrary SQL queries when a connection is first established, despite the use of TLS certificate verification and encryption. This flaw affects PgBouncer versions prior to 1.16.1."
    },
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      "lang": "es",
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    }
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  "lastModified": "2026-06-17T04:06:01.063",
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