Race condition in the _get_masked_mode function in Lib/os.py in Python
3.2 through 3.5, when exist_ok is set to true and multiple threads are
used, might allow local users to bypass intended file permissions by
leveraging a separate application vulnerability before the umask has
been set to the expected value.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[oss-security] 20140328 CVE request: os.makedirs(exist_ok=True) is not thread-safe in Python
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