fkie_cve-2025-8194
Vulnerability from fkie_nvd
Published
2025-07-28 19:15
Modified
2025-08-07 21:15
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. This vulnerability can be mitigated by including the following patch after importing the “tarfile” module:  https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1
References
cna@python.orghttps://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1
cna@python.orghttps://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38
cna@python.orghttps://github.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29f
cna@python.orghttps://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe
cna@python.orghttps://github.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b4510277227
cna@python.orghttps://github.com/python/cpython/issues/130577
cna@python.orghttps://github.com/python/cpython/pull/137027
cna@python.orghttps://mail.python.org/archives/list/security-announce@python.org/thread/ZULLF3IZ726XP5EY7XJ7YIN3K5MDYR2D/
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "There is a defect in the CPython \u201ctarfile\u201d module affecting the \u201cTarFile\u201d extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. \n\nThis vulnerability can be mitigated by including the following patch after importing the \u201ctarfile\u201d module:\u00a0 https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1"
    },
    {
      "lang": "es",
      "value": "Existe un defecto en el m\u00f3dulo \"tarfile\" de CPython que afecta a las API de extracci\u00f3n y enumeraci\u00f3n de entradas de \"TarFile\". La implementaci\u00f3n de tar procesaba archivos tar con desplazamientos negativos sin errores, lo que resultaba en un bucle infinito y un bloqueo durante el an\u00e1lisis de archivos tar manipulados con fines maliciosos. Esta vulnerabilidad se puede mitigar incluyendo el siguiente parche despu\u00e9s de importar el m\u00f3dulo \"tarfile\": import tarfile def _block_patched(self, count):     if count \u0026lt; 0: # pragma: no cover         raise tarfile.InvalidHeaderError(\"invalid offset\")     return _block_patched._orig_block(self, count) _block_patched._orig_block = tarfile.TarInfo._block tarfile.TarInfo._block = _block_patched"
    }
  ],
  "id": "CVE-2025-8194",
  "lastModified": "2025-08-07T21:15:29.780",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "cna@python.org",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-07-28T19:15:43.793",
  "references": [
    {
      "source": "cna@python.org",
      "url": "https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29f"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b4510277227"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/issues/130577"
    },
    {
      "source": "cna@python.org",
      "url": "https://github.com/python/cpython/pull/137027"
    },
    {
      "source": "cna@python.org",
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/ZULLF3IZ726XP5EY7XJ7YIN3K5MDYR2D/"
    }
  ],
  "sourceIdentifier": "cna@python.org",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-835"
        }
      ],
      "source": "cna@python.org",
      "type": "Secondary"
    }
  ]
}


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