  function reject() {
    if (reason === undefined) {
      if (localChan === false)
        reason = consts.CHANNEL_OPEN_FAILURE.RESOURCE_SHORTAGE;
      else
        reason = consts.CHANNEL_OPEN_FAILURE.CONNECT_FAILED;
    }

    self._sshstream.channelOpenFail(info.sender, reason, '', '');
  }
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.