[Security-announce][CVE-2023-6597] tempfile.TemporaryDirectory dereferences symlinks during cleanup

An issue was found in the CPython tempfile.TemporaryDirectory class affecting versions 3.12.2, 3.11.8, 3.10.13, 3.9.18, and 3.8.18 and prior.

The tempfile.TemporaryDirectory class would dereference symlinks during cleanup of permissions-related errors. This means users which can run privileged programs are potentially able to modify permissions of files referenced by symlinks in some circumstances.

*References*

• CVE: https://www.cve.org/CVERecord?id=CVE-2023-6597
• Patch: https://github.com/python/cpython/pull/99930
• Issue: https://github.com/python/cpython/issues/91133