From an application security perspective databases are the most valuable parts of our systems. They store the data that gives value to our apps and companies. This data which has been entrusted to us by our users should be kept safe and away of the hands of criminals.
Every developer I talk to is very aware of this. Their MySQL, PostgreSQL and MongoDB databases are treated with caution and security is definitely a thought. It doesn’t always works but at least everyone is aware and tries their best.
But what happens with databases that don’t feel like “regular databases”? I’m talking about Memcached, Redis and of course etcd. This kind of databases are often used for a single use case and treated without much care.