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Hello,
In RHEL 9.3 and 8.9, we're planning to fix the long-standing CVE-2007-4559: Python's `tarfile` module makes it too easy to extract tarballs in an unsafe way.
Unfortunately, for the CVE to be considered fixed, this needs a behavior change. (If you don't think this is the case, let's bring it up with the security team.)
Upstream, Python will emit deprecation warnings for 2 releases, but in RHEL we change the behavior now, emit warnings, and provide ways for customers to restore earlier behavior.
To avoid the warning, software shipped by Red Hat will need a change.

For more details see upstream PEP 706: https://peps.python.org/pep-0706
and the Red Hat knowledge base draft: https://access.redhat.com/articles/7004769

---

/usr/lib/python3.9/site-packages/dateutil/zoneinfo/rebuild.py has a tarfile extraction call that'll need changing from:

                tf.extract(name, tmpdir)

to something like:

if hasattr(tarfile, 'data_filter'):
    # Python with CVE-2007-4559 mitigation (PEP 706)
    tf.extract(name, tmpdir, filter='data')
else:
    # Fallback to a possibly dangerous extraction (before PEP 706)
    tf.extract(name, tmpdir)


Or just add the filter='data' if we can coordinate updates.

Upstream is removing tarfile handling, so they rejected the patch. But we should backport it to existing releases.

Χάρης, if you get to it, could you push this over the finish line?

Everything looks good. Sanity checked the code and this is coming from the author of the upstream PEP.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (python-dateutil bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:6691