Question

How does one fix this MySQL zero day vulnerability on Ubuntu 14.04?

It seems there’s a nasty MySQL zero day flaw that needs to be fixed on all servers running MySQL 5.7.13 and below, including MariaDB and PerconaDB: http://seclists.org/oss-sec/2016/q3/481

Does anyone know how to apply the patch to fix this vulnerability ? A quick D.O tutorial would be pretty handy.

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It appears that this vulnerability requires the attacker to already have a valid MySQL user account on your server before they can escalate privileges.

While concerning this should not provide a new attack vector unless you are running a shared hosting environment for other users. I would recommend ensuring you have updates running automatically so when an updated version is released your copy of MySQL will be updated automatically.