Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2021-2021
CVE-2021-2021:
MySQL vulnerability analysis and mitigation
Overview
CVE-2021-2021 is a vulnerability in the MySQL Server product of Oracle MySQL, specifically affecting the Server Optimizer component. The vulnerability affects MySQL versions 8.0.22 and prior. This vulnerability was disclosed in January 2021 as part of Oracle's Critical Patch Update (Oracle CPU).
Technical details
The vulnerability is characterized as an easily exploitable issue that allows high-privileged attackers with network access via multiple protocols to compromise MySQL Server. The vulnerability has received a CVSS 3.1 Base Score of 4.9 (Medium severity) with the following vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H (NVD).
Impact
Successful exploitation of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash, leading to a complete Denial of Service (DoS) of MySQL Server (NVD).
Mitigation and workarounds
The vulnerability has been fixed in MySQL version 8.0.23. Users are advised to upgrade to this version or later. For systems that cannot be immediately upgraded, network access to the MySQL Server should be restricted to trusted hosts and users (Oracle CPU, Gentoo Security).
Additional resources
Source: This report was generated using AI
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