CVE-2019-2780 in MySQL Server
Summary
by MITRE
Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Components / Services). Supported versions that are affected are 8.0.16 and prior. Easily exploitable vulnerability allows high 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 hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.0 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).
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Analysis
by VulDB Data Team • 11/08/2024
The vulnerability identified as CVE-2019-2780 resides within Oracle MySQL Server's component architecture, specifically affecting versions 8.0.16 and earlier. This flaw manifests in the Server: Components / Services subcomponent, representing a critical weakness that can be exploited by adversaries possessing high privileges and network access. The vulnerability's classification as easily exploitable indicates that attackers with elevated credentials can leverage this weakness without requiring complex attack vectors or extensive resources. The attack surface encompasses multiple network protocols, making the exploit accessible across various communication channels that MySQL Server supports.
The technical nature of this vulnerability involves a flaw that allows attackers to cause complete denial of service conditions through either hanging or frequent crashes of the MySQL Server instance. This represents a significant availability impact as the database service becomes completely inaccessible to legitimate users and applications relying on the database infrastructure. The vulnerability's CVSS 3.0 score of 4.9 reflects the moderate severity of its impact, with the availability impact component rated at high level. The CVSS vector analysis reveals that the attack requires network access with high privileges, no user interaction, and affects an unmodified system without requiring additional compromise.
The operational impact of this vulnerability extends beyond simple service disruption, as it can cause persistent system instability that may require manual intervention to restore normal operations. Database administrators and system operators face the challenge of maintaining service availability when this vulnerability is exploited, potentially leading to extended downtime for applications dependent on MySQL services. The repetitive nature of the crashes suggests that the exploitation may not require continuous attack attempts, as the system could remain in a compromised state until manual intervention occurs.
Security professionals should recognize this vulnerability as part of the broader threat landscape targeting database infrastructure components. The flaw aligns with common attack patterns identified in the MITRE ATT&CK framework under the service stoppage and availability impact categories, where adversaries target critical system components to disrupt operations. Organizations implementing MySQL Server solutions must prioritize patch management and system updates to address this vulnerability, as the affected versions represent a window of opportunity for attackers to exploit the system's instability. The vulnerability also demonstrates the importance of maintaining current software versions and implementing proper access controls to limit the privilege levels available to potential attackers. This weakness underscores the necessity of comprehensive security monitoring and incident response procedures to quickly identify and address exploitation attempts that could lead to complete service outages.