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March 2024

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[CVE-2023-6597] tempfile.TemporaryDirectory dereferences symlinks during cleanup
by Ee Durbin March 19, 2024

March 19, 2024

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

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[CVE-2024-0450] Quoted zip-bomb protection for zipfile
by Ee Durbin March 19, 2024

March 19, 2024

An issue was found in the CPython `zipfile` module affecting versions 3.12.2, 3.11.8, 3.10.13, 3.9.18, and 3.8.18 and prior. The zipfile module is vulnerable to “quoted-overlap” zip-bombs which exploit the zip format to create a zip-bomb with a high compression ratio. The fixed versions of CPython makes the zipfile module reject zip archives which overlap entries in the archive. *References* * CVE: https://www.cve.org/CVERecord?id=CVE-2024-0450 * Patch: https://github.com/python/cpython/pull/110016 * Issue: https://github.com/python/cpython/issues/109858

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