CVE-2024-21134 in MySQL Server
Summary
by MITRE • 07/17/2024
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Connection Handling). Supported versions that are affected are 8.0.37 and prior and 8.4.0 and prior. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of MySQL Server. CVSS 3.1 Base Score 4.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L).
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Analysis
by VulDB Data Team • 10/24/2024
The vulnerability identified as CVE-2024-21134 affects the MySQL Server component responsible for connection handling within Oracle MySQL database systems. This issue impacts versions 8.0.37 and earlier, as well as 8.4.0 and earlier releases, representing a significant security concern for database administrators managing these systems. The vulnerability resides in the server's connection handling mechanisms, which are fundamental to database operations and access control. The affected component operates as part of the core server infrastructure, managing client connections and authentication processes that form the backbone of database communication protocols.
This vulnerability represents a low-privilege attack vector that can be exploited through multiple network protocols, making it particularly dangerous in environments where network access is not strictly controlled. The flaw allows attackers with minimal privileges to establish connections to the MySQL server and potentially disrupt service availability. The CVSS 3.1 scoring of 4.3 reflects the moderate severity of the impact, with the availability impact rating of "low" indicating that the vulnerability can cause partial denial of service conditions. The attack requires network access and low privileges, but does not require user interaction or specific system context, making it accessible to a broad range of potential attackers.
The operational impact of this vulnerability manifests primarily through partial denial of service conditions that can significantly affect database availability and performance. When exploited successfully, the vulnerability can disrupt legitimate database operations by consuming connection resources or causing connection handling failures that prevent authorized users from accessing database services. This partial DOS condition can lead to service degradation, application slowdowns, or temporary unavailability of database resources, directly impacting business operations that depend on MySQL database services. The vulnerability's potential to affect multiple protocols means that attackers can leverage various connection methods to exploit the flaw, increasing the attack surface and making detection more challenging.
Security professionals should prioritize patching affected systems to address this vulnerability, as the combination of low privilege requirements and network accessibility makes it particularly attractive to threat actors. Organizations should implement network segmentation and access controls to limit exposure, while monitoring for unusual connection patterns or resource consumption that might indicate exploitation attempts. The vulnerability aligns with CWE-284 Access Control Issues, specifically related to inadequate connection handling and resource management within database server components. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and denial of service, potentially enabling adversaries to disrupt database services while maintaining low-level access. Mitigation strategies should include immediate patch deployment, network-level restrictions on database ports, and comprehensive monitoring of connection handling activities to detect anomalous behavior that might indicate exploitation attempts.