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Vulnerability DatabaseCVE-2021-2390

CVE-2021-2390: 
MySQL vulnerability analysis and mitigation

Overview

The vulnerability (CVE-2021-2390) affects the MySQL Server product of Oracle MySQL, specifically in the InnoDB component. The affected versions include MySQL Server 5.7.34 and prior, as well as 8.0.25 and prior (NVD, Ubuntu).

Technical details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of MySQL. The specific flaw exists within the processing of Authentication commands in the memcached plugin. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. The vulnerability has been assigned a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) (ZDI).

Impact

An attacker can leverage this vulnerability to execute code in the context of the service account. The high CVSS score indicates that successful exploitation could lead to complete compromise of the system's confidentiality, integrity, and availability (ZDI).

Mitigation and workarounds

Oracle has issued an update to correct this vulnerability. The fix was released as part of Oracle's July 2021 Critical Patch Update (Oracle CPU).

Additional resources

Source: This report was generated using AI

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