- Update to 3.9.20:
- Tests
- gh-112769: The tests now correctly compare zlib version when
:const:`zlib.ZLIB_RUNTIME_VERSION` contains non-integer suffixes. For
example zlib-ng defines the version as ``1.3.0.zlib-ng``.
- gh-117187: Fix XML tests for vanilla Expat <2.6.0.
- Security
- gh-123678: Upgrade libexpat to 2.6.3
- gh-121957: Fixed missing audit events around interactive use of Python,
now also properly firing for ``python -i``, as well as for ``python -m
asyncio``. The event in question is ``cpython.run_stdin``.
- gh-122133: Authenticate the socket connection for the
``socket.socketpair()`` fallback on platforms where ``AF_UNIX`` is not
available like Windows.
Patch by Gregory P. Smith and Seth Larson
. Reported by Ellie
- gh-121285: Remove backtracking from tarfile header parsing for
``hdrcharset``, PAX, and GNU sparse headers
(bsc#1230227, CVE-2024-6232).
- gh-118486: :func:`os.mkdir` on Windows now accepts *mode* of ``0o700`` to
restrict the new directory to the current user. This fixes CVE-2024-4030
affecting :func:`tempfile.mkdtemp` in scenarios where the base temporary
directory is more permissive than the default.
- gh-114572: :meth:`ssl.SSLContext.cert_store_stats` and
:meth:`ssl.SSLContext.get_ca_certs` now correctly lock access to the
certificate store, when the :class:`ssl.SSLContext` is shared across
multiple threads (bsc#1226447, CVE-2024-0397).
- gh-116741: Update bundled libexpat to 2.6.2
- Library
- gh-123270: Applied a more surgical fix for malformed payloads in
:class:`zipfile.Path` causing infinite loops (gh-122905) without breaking
contents using legitimate characters (bsc#1229704, CVE-2024-8088).
- gh-123067: Fix quadratic complexity in parsing ``"``-quoted cookie values
with backslashes by :mod:`http.cookies`.
- gh-121650: :mod:`email` headers with embedded newlines are now quoted on
output. The :mod:`~email.generator` will now refuse to serialize (write)
headers that are unsafely folded or delimited; see
:attr:`~email.policy.Policy.verify_generated_headers`. (Contributed by Bas
Bloemsaat and Petr Viktorin in :gh:`121650`; CVE-2024-6923, bsc#1228780).
- gh-113171: Fixed various false positives and false negatives in
* :attr:`ipaddress.IPv4Address.is_private` (see these docs for details)
* :attr:`ipaddress.IPv4Address.is_global`
* :attr:`ipaddress.IPv6Address.is_private`
* :attr:`ipaddress.IPv6Address.is_global`
Also in the corresponding :class:`ipaddress.IPv4Network` and
:class:`ipaddress.IPv6Network` attributes
Fixes bsc#1226448 (CVE-2024-4032).
- gh-102988: :func:`email.utils.getaddresses` and
:func:`email.utils.parseaddr` now return ``('', '')`` 2-tuples in more
situations where invalid email addresses are encountered instead of
potentially inaccurate values. Add optional *strict* parameter to these
two functions: use ``strict=False`` to get the old behavior, accept
malformed inputs. ``getattr(email.utils, 'supports_strict_parsing',
False)`` can be use to check if the *strict* paramater is available. Patch
by Thomas Dwyer and Victor Stinner to improve the CVE-2023-27043 fix
(bsc#1210638).
- gh-67693: Fix :func:`urllib.parse.urlunparse` and
:func:`urllib.parse.urlunsplit` for URIs with path starting with multiple
slashes and no authority. Based on patch by Ashwin Ramaswami.
- Core and Builtins
- gh-112275: A deadlock involving ``pystate.c``'s ``HEAD_LOCK`` in
``posixmodule.c`` at fork is now fixed. Patch by ChuBoning based on
previous Python 3.12 fix by Victor Stinner.
- Remove upstreamed patches:
- CVE-2023-27043-email-parsing-errors.patch
- CVE-2024-6232-cookies-quad-complex.patch
- CVE-2024-4032-private-IP-addrs.patch
- CVE-2024-0397-memrace_ssl.SSLContext_cert_store.patch
- CVE-2024-8088-inf-loop-zipfile_Path.patch
- CVE-2024-6923-email-hdr-inject.patch