Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Connection Handling). Supported versions that are affected are MySQL Server: 8.4.0-8.4.9, 9.0.0-9.7.0; MySQL Cluster: 8.0.11-8.0.46, 8.4.0-8.4.9 and 9.0.0-9.7.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Weakness
The product does not properly control the allocation and maintenance of a limited resource.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mysql_cluster | Oracle | 8.0.11 (including) | 8.0.46 (including) |
| Mysql_cluster | Oracle | 8.4.0 (including) | 8.4.9 (including) |
| Mysql_cluster | Oracle | 9.0.0 (including) | 9.7.0 (including) |
| Mysql_server | Oracle | 8.4.0 (including) | 8.4.9 (including) |
| Mysql_server | Oracle | 9.0.0 (including) | 9.7.0 (including) |
| Mariadb-10.3 | Ubuntu | esm-apps/focal | * |
| Mysql-5.5 | Ubuntu | esm-infra-legacy/trusty | * |
| Mysql-5.7 | Ubuntu | esm-infra-legacy/xenial | * |
| Mysql-5.7 | Ubuntu | esm-infra/bionic | * |
| Mysql-8.0 | Ubuntu | esm-infra/focal | * |
| Mysql-8.0 | Ubuntu | jammy | * |
| Mysql-8.0 | Ubuntu | noble | * |
| Mysql-8.4 | Ubuntu | devel | * |
| Mysql-8.4 | Ubuntu | questing | * |
| Mysql-8.4 | Ubuntu | resolute | * |
| Mysql-8.4 | Ubuntu | upstream | * |
Potential Mitigations
Mitigation of resource exhaustion attacks requires that the target system either:
The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/147.html
- https://cwe.mitre.org/data/definitions/227.html
- https://cwe.mitre.org/data/definitions/492.html