CVE-2023-22026: Vulnerability in MySQL Server - Exploit Details, Code Snippet, and Essential References

A new vulnerability (CVE-2023-22026) has been identified in the MySQL Server product of Oracle MySQL, specifically in the "Server: Optimizer" component. Supported versions affected by the vulnerability are 5.7.42 and prior, and 8..31 and prior. This vulnerability can be easily exploited by a high privileged attacker with network access via multiple protocols, allowing them to compromise MySQL Server. Successful attacks could lead to a complete Denial of Service (DoS), causing the server to hang or crash repeatedly. The CVSS 3.1 Base Score for this vulnerability is 4.9, signifying availability impacts. The CVSS Vector is (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Exploit Details

This vulnerability can be exploited by an attacker with high privileges who has network access via multiple protocols. The attacker could craft a specific SQL query or modify an existing one, targeting the optimizer component of MySQL Server. This action might lead to a hang or repeatedly crash the database server, effectively resulting in a DoS attack.

Code Snippet

Please note that the following is an example of an SQL query that might trigger the vulnerability in MySQL Server. However, the actual exploitation of the vulnerability may vary based on the attacker's specific environment and requirements.

SELECT *
FROM vulnerable_table
WHERE vulnerable_column = (SELECT * FROM another_vulnerable_table)
ORDER BY potentially_vulnerable_column;

In the above example, the attacker would substitute the table and column names with their actual targets, taking advantage of the vulnerability in the MySQL Server optimizer component.

Original References

To fully understand and mitigate the vulnerability's impact, it is recommended to refer to the following resources provided by Oracle and the CVE database:

1. Oracle's Security Alert Advisory: https://www.oracle.com/security-alerts/alert-CVE-2023-22026.html
2. CVE Details: https://nvd.nist.gov/vuln/detail/CVE-2023-22026
3. Oracle's Patch Availability Document: https://www.oracle.com/technetwork/security-advisory/cpuapr2023-4435209.html

Mitigation Steps

To mitigate the risk of this vulnerability, it is strongly recommended to apply the patches provided by Oracle as soon as possible. In addition, you should also consider implementing the following security best practices:

1. Restrict network access to the MySQL Server, allowing only trusted IP addresses and necessary protocols.
2. Enforce the principle of least privilege, granting users and applications the minimum access required to perform their tasks.
3. Regularly audit user accounts and roles, ensuring that the privileges are appropriate and in line with the best security practices.

Conclusion

The CVE-2023-22026 vulnerability in the MySQL Server (Server: Optimizer component) is a serious risk that could lead to a complete DoS if successfully exploited. It is crucial to understand the exploit details, utilize code snippets where necessary, consult original references for comprehensive information, and apply mitigation steps to protect your MySQL Server environment from potential exploitation by high privileged attackers.

Timeline

Published on: 10/17/2023 22:15:11 UTC
Last modified on: 10/27/2023 15:15:09 UTC