CVE-2025-8291

{"id": "CVE-2025-8291", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-8291", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2025-10-29T15:15:06.403842Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cna@python.org", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 2.8}]}, "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": "3.10.0", "lessThan": "3.10.19", "versionType": "python"}, {"status": "affected", "version": "3.11.0", "lessThan": "3.11.14", "versionType": "python"}, {"status": "affected", "version": "3.12.0", "lessThan": "3.12.12", "versionType": "python"}, {"status": "affected", "version": "3.13.0", "lessThan": "3.13.10", "versionType": "python"}, {"status": "affected", "version": "3.14.0", "lessThan": "3.14.1", "versionType": "python"}], "defaultStatus": "unaffected"}]}], "published": "2025-10-07T18:16:00.317", "references": [{"url": "https://github.com/python/cpython/commit/162997bb70e067668c039700141770687bc8f267", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/1d29afb0d6218aa8fb5e1e4a6133a4778d89bb46", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/333d4a6f4967d3ace91492a39ededbcf3faa76a6", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/76437ac248ad8ca44e9bf697b02b1e2241df2196", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/8392b2f0d35678407d9ce7d95655a5b77de161b4", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/bca11ae7d575d87ed93f5dd6a313be6246e3e388", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/commit/d11e69d6203080e3ec450446bfed0516727b85c3", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/issues/139700", "source": "cna@python.org"}, {"url": "https://github.com/python/cpython/pull/139702", "source": "cna@python.org"}, {"url": "https://mail.python.org/archives/list/security-announce@python.org/thread/QECOPWMTH4VPPJAXAH2BGTA4XADOP62G/", "source": "cna@python.org"}, {"url": "https://github.com/google/security-research/security/advisories/GHSA-hhv7-p4pg-wm6p", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}, {"url": "https://github.com/psf/advisory-database/blob/main/advisories/python/PSF-2025-12.json", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-1285"}]}], "descriptions": [{"lang": "en", "value": "The 'zipfile' module would not check the validity of the ZIP64 End of\nCentral Directory (EOCD) Locator record offset value would not be used to\nlocate the ZIP64 EOCD record, instead the ZIP64 EOCD record would be\nassumed to be the previous record in the ZIP archive. This could be abused\nto create ZIP archives that are handled differently by the 'zipfile' module\ncompared to other ZIP implementations.\n\n\nRemediation maintains this behavior, but checks that the offset specified\nin the ZIP64 EOCD Locator record matches the expected value."}, {"lang": "es", "value": "El m\u00f3dulo 'zipfile' no verificar\u00eda la validez del valor de desplazamiento del registro localizador del Fin del Directorio Central (EOCD) ZIP64, y este valor no se usar\u00eda para localizar el registro EOCD ZIP64; en su lugar, se asumir\u00eda que el registro EOCD ZIP64 es el registro anterior en el archivo ZIP. Esto podr\u00eda ser abusado para crear archivos ZIP que son manejados de manera diferente por el m\u00f3dulo 'zipfile' en comparaci\u00f3n con otras implementaciones ZIP.\n\nLa remediaci\u00f3n mantiene este comportamiento, pero verifica que el desplazamiento especificado en el registro localizador EOCD ZIP64 coincide con el valor esperado."}], "lastModified": "2026-10-08T22:10:00.563", "sourceIdentifier": "cna@python.org"}