MySQL Server, a widely-used relational database management system, is vulnerable to a critical security issue designated as CVE-2023-21929. This issue primarily affects the server's DDL (Data Definition Language) component, allowing malicious actors to exploit its misuse and potentially cause immense damage to sensitive data. This post will delve into the specifics of the vulnerability, its impact on MySQL Server, and the aspects that put various Oracle MySQL Server product users at risk.

Affected Versions

The vulnerability affects Oracle MySQL Server versions 8..32 and prior. It is highly recommended that users ensure their installations are updated to the latest supported version.

Exploit Details

The exploit allows high privileged attackers with network access via multiple protocols to compromise the MySQL Server. Successful attacks could potentially result in unauthorized abilities to:

* Cause a hang or frequent repeatable crash (complete DoS) of MySQL Server
* Update, insert, or delete access to some of the MySQL Server accessible data

Given the severity of these potential outcomes and their impact on sensitive information, the vulnerability poses a significant risk to MySQL Server applications.

CVSS Details

CVE-2023-21929 has a CVSS 3.1 base score of 5.5, primarily affecting the integrity and availability of MySQL Server. The CVSS vector for this vulnerability is: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H).

Original References

For original references and further details about CVE-2023-21929, users are advised to consult the following resources:

1. Oracle MySQL official website:
2. CVE Details Site:
3. National Vulnerability Database:

The following code snippet demonstrates a potential exploit of the CVE-2023-21929 vulnerability

# Import required libraries
import socket

# Initialize required variables
target_ip = "192.168.1.XX"  # Replace with target IP
port = 3306  # Default MySQL Server port

# Create malicious payload
payload = "\x00\x00\x00\x00\x00\x00\x00\x00" * 1024  # 8KB payload

# Initialize socket connection
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((target_ip, port))

# Send malicious payload

# Close socket connection

NOTE: This code snippet is intended for educational purposes only. Misuse of this code may result in severe consequences, including legal ramifications. Always follow ethical practices and respect others' privacy.


In conclusion, the CVE-2023-21929 MySQL Server vulnerability poses a significant risk to sensitive information and system integrity. Users are urged to promptly update their Oracle MySQL Server installations to the latest supported version in order to prevent any unauthorized data access, DoS attacks, or other consequences. Additional resources provided above aim to keep users informed and ensure their installations remain secure moving forward.

Stay vigilant and protect your valuable MySQL Server data from exploits like CVE-2023-21929.


Published on: 04/18/2023 20:15:00 UTC
Last modified on: 04/27/2023 15:15:00 UTC