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{"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 &lt; 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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