A year ago, I blogged about An Unprivileged User can crash your MySQL Server. At the time, I explained how to protect yourself against this problem. A few weeks ago, I revisited this vulnerability in a follow-up post in which I explained the fix, claimed that the MySQL 5.7 default configuration for Group Replication is still problematic, and explained a tuning to avoid the vulnerability. In this last post in the series, I explain how to exploit this vulnerability to crash older version of MySQL (or untuned Group Replication in 5.7), but this needs a lot of determination.
