CVE-2025-8291

Medium CVSS: 4.3

The 'zipfile' module would not check the validity of the ZIP64 End of
Central Directory (EOCD) Locator record offset value would not be used to
locate the ZIP64 EOCD record, instead the ZIP64 EOCD record would be
assumed to be the previous record in the ZIP archive. This could be abused
to create ZIP archives that are handled differently by the 'zipfile' module
compared to other ZIP implementations.

Remediation maintains this behavior, but checks that the offset specified
in the ZIP64 EOCD Locator record matches the expected value.

Vendor

Product

CWE

CWE-1285

Yayın Tarihi

2025-10-07 18:16:00

Güncelleme

2025-10-29 16:15:35

Source Identifier

cna@python.org

KEV Date Added

Kategoriler

CWE-1285 MEDIUM 2025

Referanslar

https://github.com/python/cpython/commit/162997bb70e067668c039700141770687bc8f267 https://github.com/python/cpython/commit/1d29afb0d6218aa8fb5e1e4a6133a4778d89bb46 https://github.com/python/cpython/commit/333d4a6f4967d3ace91492a39ededbcf3faa76a6 https://github.com/python/cpython/commit/76437ac248ad8ca44e9bf697b02b1e2241df2196 https://github.com/python/cpython/commit/8392b2f0d35678407d9ce7d95655a5b77de161b4 https://github.com/python/cpython/commit/bca11ae7d575d87ed93f5dd6a313be6246e3e388 https://github.com/python/cpython/commit/d11e69d6203080e3ec450446bfed0516727b85c3 https://github.com/python/cpython/issues/139700 https://github.com/python/cpython/pull/139702 https://mail.python.org/archives/list/security-announce@python.org/thread/QECOPWMTH4VPPJAXAH2BGTA4XADOP62G/ https://github.com/google/security-research/security/advisories/GHSA-hhv7-p4pg-wm6p https://github.com/psf/advisory-database/blob/main/advisories/python/PSF-2025-12.json