CVE-2022-21425: 
MySQL vulnerability analysis and mitigation

CVE-2022-21425 is a vulnerability in the MySQL Server product of Oracle MySQL, specifically affecting the Server: DDL component. The vulnerability affects MySQL versions 8.0.28 and prior. This easily exploitable vulnerability allows high-privileged attackers with network access via multiple protocols to compromise MySQL Server (NVD, Oracle Advisory).

The vulnerability has a CVSS 3.1 Base Score of 5.5 (Medium severity) with the vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H. The vulnerability requires network access and high privileges to exploit, but has low attack complexity and requires no user interaction. The scope is unchanged, with no confidentiality impact, low integrity impact, and high availability impact (NVD, NetApp Advisory).

Successful exploitation of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. Additionally, it can lead to unauthorized update, insert or delete access to some of MySQL Server accessible data (NVD).

Oracle has released security patches to address this vulnerability. Users should upgrade to MySQL versions after 8.0.28. For systems that cannot be immediately upgraded, network access controls and privilege restrictions should be implemented to reduce the risk of exploitation (Oracle Advisory).