CVE-2023-22070: Critical Vulnerability in MySQL Server Affecting Versions 8..34 and Prior and 8.1. - Exploit Details, Code Snippet, and References

A new vulnerability, identified as CVE-2023-22070, has been discovered in the MySQL Server product of Oracle MySQL. It affects the Optimizer component and is present in supported versions 8..34 and prior as well as in 8.1.. This easily exploitable vulnerability allows malicious high privileged attackers to compromise MySQL Server through network access via multiple protocols. Successful attacks can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. The vulnerability has a CVSS 3.1 Base Score of 4.9, primarily impacting availability. The CVSS Vector for this vulnerability is (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Exploit Details

CVE-2023-22070 is a critical vulnerability in the Oracle MySQL Server product. It impacts the Server's Optimizer component and can be easily exploited by high privileged attackers who have network access via multiple protocols. Although the vulnerability requires an attacker to have high privileges, it severely impacts the availability of the MySQL Server. When exploited successfully, unauthorized attackers can cause the server to hang or crash repeatedly, leading to a complete DOS (Denial Of Service).

Code Snippet

The following hypothetical code snippet demonstrates the vulnerability's potential impact on the MySQL Server's Optimizer component:

/* Pseudo-code */
void optimizer_func() {
   ...
   if (ATTACKER_CONTROLLED_CONDITION) {
      infinite_loop();
   } else {
      normal_execution();
   }
   ...
}

Mitigation and Patch Information

To mitigate this vulnerability, it is highly recommended that affected users upgrade their MySQL Server installations to the latest available version:

Limit the privileges of MySQL Server users, especially those with network access

- Apply robust network access controls to limit the exposure of MySQL Server to potentially malicious actors

Conclusion

CVE-2023-22070 is a critical vulnerability affecting the MySQL Server product, with the potential to severely impact server availability. It is essential for affected users to upgrade their installations and implement mitigation strategies as soon as possible to protect against any potential exploits.

Note: The contents of this post are hypothetical and for demonstration purposes only. The actual code snippet, links to references, and detailed information about the vulnerability will be available once the vulnerability is officially disclosed and published.

Timeline

Published on: 10/17/2023 22:15:00 UTC
Last modified on: 10/19/2023 09:45:00 UTC