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Vulnerability DatabaseCVE-2023-21920

CVE-2023-21920: 
MySQL vulnerability analysis and mitigation

Overview

CVE-2023-21920 is a vulnerability in the MySQL Server product of Oracle MySQL, specifically affecting the Server: Optimizer component. The vulnerability affects MySQL Server versions 8.0.32 and prior. This security issue was disclosed as part of Oracle's April 2023 Critical Patch Update (Oracle CPU).

Technical details

The vulnerability has been assigned 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. The vulnerability is characterized as easily exploitable and requires a high-privileged attacker with network access via multiple protocols to compromise MySQL Server (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. The vulnerability only affects availability, with no impact on confidentiality or integrity (Oracle CPU).

Mitigation and workarounds

Oracle has released patches to address this vulnerability in MySQL version 8.0.33. Various distributions have also released updated packages, including Fedora 37, 38, and 39. Users are strongly recommended to upgrade to the patched versions (Fedora Update).

Additional resources

Source: This report was generated using AI

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