Cached DNS queries / speed to resolve can indeed be exploited, as shown here: https://www.chaoswebs.net/timebleed/ https://www.chaoswebs.net/timebleed/ There a

Cached DNS queries / speed to resolve can indeed be exploited, as shown here: https://www.chaoswebs.net/timebleed/ https://www.chaoswebs.net/timebleed/ There are efforts to prevent this in the future but for now disabling or limiting DNS cache seems the only viable option.