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CVE-2025-4435

Estado: AplazadaAlta (7.5)—

When using a TarFile.errorlevel = 0 and extracting with a filter the documented behavior is that any filtered members would be skipped and not extracted. However the actual behavior of TarFile.errorlevel = 0 in affected versions is that the member would still be extracted and not skipped.

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)

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

Python — TarfileAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-4435",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-4435",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-06-03T13:58:00.099450Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "cna@python.org",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cna@python.org",
      "affectedData": [
        {
          "repo": "https://github.com/python/cpython",
          "vendor": "Python Software Foundation",
          "modules": [
            "tarfile"
          ],
          "product": "CPython",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "3.9.23",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.10.0",
              "lessThan": "3.10.18",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.11.0",
              "lessThan": "3.11.13",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.12.0",
              "lessThan": "3.12.11",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.13.0",
              "lessThan": "3.13.4",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.14.0a1",
              "lessThan": "3.14.0b3",
              "versionType": "python"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2025-06-03T13:15:20.630",
  "references": [
    {
      "url": "https://github.com/python/cpython/commit/19de092debb3d7e832e5672cc2f7b788d35951da",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/28463dba112af719df1e8b0391c46787ad756dd9",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/3612d8f51741b11f36f8fb0494d79086bac9390a",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/4633f3f497b1ff70e4a35b6fe2c907cbe2d4cb2e",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/9c1110ef6652687d7c55f590f909720eddde965a",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/9e0ac76d96cf80b49055f6d6b9a6763fb9215c2a",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/aa9eb5f757ceff461e6e996f12c89e5d9b583b01",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/dd8f187d0746da151e0025c51680979ac5b4cfb1",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/issues/135034",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/pull/135037",
      "source": "cna@python.org"
    },
    {
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/MAXIJJCUUMCL7ATZNDVEGGHUMQMUUKLG/",
      "source": "cna@python.org"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-682"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "When using a TarFile.errorlevel = 0 and extracting with a filter the documented behavior is that any filtered members would be skipped and not extracted. However the actual behavior of TarFile.errorlevel = 0 in affected versions is that the member would still be extracted and not skipped."
    },
    {
      "lang": "es",
      "value": "Al usar TarFile.errorlevel = 0 y extraer con un filtro, el comportamiento documentado es que cualquier miembro filtrado se omite y no se extrae. Sin embargo, el comportamiento real de TarFile.errorlevel = 0 en las versiones afectadas es que el miembro se extrae y no se omite."
    }
  ],
  "lastModified": "2026-07-31T14:16:44.653",
  "sourceIdentifier": "cna@python.org"
}