tarfile: Skip DIRTYPE normalization during GNU LONGNAME/LONGLINK handling
Vulnerability Description
The "tarfile" module would still apply normalization of AREGTYPE (\x00) blocks to DIRTYPE, even while processing a multi-block member such as GNUTYPE_LONGNAME or GNUTYPE_LONGLINK. This could result in a crafted tar archive being misinterpreted by the tarfile module compared to other implementations.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://github.com/python/cpython/pull/143934
- https://github.com/python/cpython/issues/141707
- https://mail.python.org/archives/list/security-announce@python.org/thread/EOMI5I66ZMKQ2INNFT6T7IAIKUGPZYIE/
- https://github.com/python/cpython/commit/42d754e34c06e57ad6b8e7f92f32af679912d8ab
- https://github.com/python/cpython/commit/7ad3093d76a748af55bdb1d2e8aad3638163b017
- https://github.com/python/cpython/commit/ae99fe3a33b43e303a05f012815cef60b611a9c7
- https://github.com/python/cpython/commit/72dde1016493c52abe857fc4a7bf6c40138b4114
- https://github.com/python/cpython/commit/9a23b753552afa28e3a2f4d8863572fc66479406
- https://github.com/python/cpython/commit/d10950739a78f54d0718d88fb5a868374603c084
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