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…H-25099) (GH-25815) Reverts commit e653d4d and makes parsing even more strict. Like socket.inet_pton() any leading zero is now treated as invalid input. Signed-off-by: Christian Heimes <christian@python.org> Co-authored-by: Łukasz Langa <lukasz@langa.pl> (cherry picked from commit 60ce8f0)
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Misc/NEWS.d/next/Security/2021-03-30-16-29-51.bpo-36384.sCAmLs.rst
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,6 @@ | ||
:mod:`ipaddress` module no longer accepts any leading zeros in IPv4 address | ||
strings. Leading zeros are ambiguous and interpreted as octal notation by | ||
some libraries. For example the legacy function :func:`socket.inet_aton` | ||
treats leading zeros as octal notatation. glibc implementation of modern | ||
:func:`~socket.inet_pton` does not accept any leading zeros. For a while | ||
the :mod:`ipaddress` module used to accept ambiguous leading zeros. |