[issue6972] zipfile.ZipFile overwrites files outside destination path

[Thomas W. Barr]

Thomas W. Barr <twb at rice.edu> added the comment:

os.path.realpath() doesn't normalize case, so this could have issues on
Windows. The new patch should not.

The Mac version of os.path.normpath doesn't change the path, as per the
posix version, which isn't correct on HFS+, which is not case sensitive.
That's another bug for another ticket, though.

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Added file: http://bugs.python.org/file15009/zipfile-6972-patch-2.diff

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