  void Start() {
    CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
    BrowserThread::PostTask(
        BrowserThread::IO,
        FROM_HERE,
        NewRunnableMethod(this,
                          &SafeBeginInstallHelper::StartWorkOnIOThread));
  }

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.