  function onFinish() {
    self.eof();
    if (server || (!server && !self.allowHalfOpen))
      self.close();
    self.writable = false;
  }
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.