tarfile: Skip DIRTYPE normalization during GNU LONGNAME/LONGLINK handling
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 2epss 0.2%
exploitation probability
0.2%top 94% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Affected products
Python Software Foundation · CPythonReferences
https://github.com/python/cpython/commit/42d754e34c06e57ad6b8e7f92f32af679912d8abhttps://github.com/python/cpython/commit/72dde1016493c52abe857fc4a7bf6c40138b4114https://github.com/python/cpython/commit/7ad3093d76a748af55bdb1d2e8aad3638163b017https://github.com/python/cpython/commit/9a23b753552afa28e3a2f4d8863572fc66479406https://github.com/python/cpython/commit/ae99fe3a33b43e303a05f012815cef60b611a9c7https://github.com/python/cpython/commit/d10950739a78f54d0718d88fb5a868374603c084https://github.com/python/cpython/issues/141707https://github.com/python/cpython/pull/143934https://mail.python.org/archives/list/security-announce@python.org/thread/EOMI5I66ZMKQ2INNFT6T7IAIKUGPZYIE/