def _cnonce():
    dig = _md5(
        (
            "%s:%s"
            % (time.ctime(), ["0123456789"[random.randrange(0, 9)] for i in range(20)])
        ).encode("utf-8")
    ).hexdigest()
    return dig[:16]
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.