    def put_file(self, in_path, out_path):
        ''' transfer a file from local to chroot '''

        out_path = self._normalize_path(out_path, self.get_jail_path())
        vvv("PUT %s TO %s" % (in_path, out_path), host=self.jail)

        self._copy_file(in_path, out_path)
The software attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.