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CVE-2024-5642

Estado: AplazadaMedia (6.5)—

CPython 3.9 and earlier doesn't disallow configuring an empty list ("[]") for SSLContext.set_npn_protocols() which is an invalid value for the underlying OpenSSL API. This results in a buffer over-read when NPN is used (see CVE-2024-5535 for OpenSSL). This vulnerability is of low severity due to NPN being not widely used and specifying an empty list likely being uncommon in-practice (typically a protocol name would be configured).

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 (2)

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

Openssl — OpensslAIPython — CpythonAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2024-5642",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-5642",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-06-28T13:47:34.169947Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.5,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cna@python.org",
      "affectedData": [
        {
          "repo": "https://github.com/python/cpython",
          "vendor": "Python Software Foundation",
          "product": "CPython",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "3.9.24",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.10.0a1",
              "lessThan": "3.10.0b1",
              "versionType": "python"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2024-06-27T21:15:16.070",
  "references": [
    {
      "url": "http://www.openwall.com/lists/oss-security/2024/06/28/4",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/a2cdbb6e8188ba9ba8b356b28d91bff60e86fe31",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/issues/121227",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/pull/23014",
      "source": "cna@python.org"
    },
    {
      "url": "https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html",
      "source": "cna@python.org"
    },
    {
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/",
      "source": "cna@python.org"
    },
    {
      "url": "https://security.netapp.com/advisory/ntap-20240726-0005/",
      "source": "cna@python.org"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2024/06/28/4",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/python/cpython/issues/121227",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/python/cpython/pull/23014",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://security.netapp.com/advisory/ntap-20240726-0005/",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "CPython 3.9 and earlier doesn't disallow configuring an empty list (\"[]\") for SSLContext.set_npn_protocols() which is an invalid value for the underlying OpenSSL API. This results in a buffer over-read when NPN is used (see CVE-2024-5535 for OpenSSL). This vulnerability is of low severity due to NPN being not widely used and specifying an empty list likely being uncommon in-practice (typically a protocol name would be configured)."
    },
    {
      "lang": "es",
      "value": "CPython 3.9 y versiones anteriores no permiten la configuración de una lista vacía (\"[]\") para SSLContext.set_npn_protocols(), que es un valor no válido para la API OpenSSL subyacente. Esto da como resultado una lectura excesiva del búfer cuando se utiliza NPN (consulte CVE-2024-5535 para OpenSSL). Esta vulnerabilidad es de baja gravedad debido a que NPN no se usa ampliamente y especificar una lista vacía probablemente sea poco común en la práctica (normalmente se configuraría un nombre de protocolo)."
    }
  ],
  "lastModified": "2026-07-31T15:16:26.997",
  "sourceIdentifier": "cna@python.org"
}