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[3.9] gh-91783: Document security considerations for shutil.unpack_archive (GH-91844) #92166

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May 2, 2022
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[3.9] gh-91783: Document security considerations for shutil.unpack_archive (GH-91844) #92166

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8 changes: 7 additions & 1 deletion Doc/library/shutil.rst
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Expand Up @@ -630,10 +630,16 @@ provided. They rely on the :mod:`zipfile` and :mod:`tarfile` modules.

.. audit-event:: shutil.unpack_archive filename,extract_dir,format shutil.unpack_archive

.. warning::

Never extract archives from untrusted sources without prior inspection.
It is possible that files are created outside of the path specified in
the *extract_dir* argument, e.g. members that have absolute filenames
starting with "/" or filenames with two dots "..".

.. versionchanged:: 3.7
Accepts a :term:`path-like object` for *filename* and *extract_dir*.


.. function:: register_unpack_format(name, extensions, function[, extra_args[, description]])

Registers an unpack format. *name* is the name of the format and
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Documentation/2022-04-23-00-22-54.gh-issue-91783.N09dRR.rst
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@@ -0,0 +1,2 @@
Document security issues concerning the use of the function
:meth:`shutil.unpack_archive`