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bpo-43285: Whats New entry for 3.8.9. #24886

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9 changes: 9 additions & 0 deletions Doc/whatsnew/3.8.rst
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Original file line number Diff line number Diff line change
@@ -2254,3 +2254,12 @@ The constant values of future flags in the :mod:`__future__` module
are updated in order to prevent collision with compiler flags. Previously
``PyCF_ALLOW_TOP_LEVEL_AWAIT`` was clashing with ``CO_FUTURE_DIVISION``.
(Contributed by Batuhan Taskaya in :issue:`39562`)

Notable changes in Python 3.8.9
===============================

A security fix alters the :class:`ftplib.FTP` behavior to not trust the
IPv4 address sent from the remote server when setting up a passive data
channel. We reuse the ftp servers IP address instead. For unusual code
requiring the old behavior, set a ``trust_server_pasv_ipv4_address``
attribute on your FTP instance to ``True``. (See :issue:`43285`)