    def sanitize(params)
      return [] if params.nil? || params.empty?
      params.collect do |k, v|
        [sanitize_key(k), sanitize_value(v)]
      end
    end
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.