CVE-2019-2589 in MySQL Server
Summary
by MITRE
Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Security: Privileges). Supported versions that are affected are 8.0.15 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 • 11/05/2024
The vulnerability identified as CVE-2019-2589 resides within Oracle MySQL Server's security privilege subsystem, specifically affecting versions 8.0.15 and earlier. This weakness represents a critical availability threat that demonstrates how insufficient privilege validation can be exploited by attackers with elevated network access. The vulnerability operates within the broader context of database security where proper access controls and privilege management are fundamental to maintaining system integrity and availability. The affected component falls under the server security category, making it particularly concerning as it directly impacts the core functionality of the database system.
The technical flaw manifests as a privilege escalation mechanism that allows a high-privileged attacker to manipulate the MySQL server's internal operations through multiple network protocols. This vulnerability specifically targets the server's privilege handling mechanisms, creating a condition where unauthorized operations can trigger system instability. The flaw's exploitability requires only network access from an attacker who already possesses high privileges, making it particularly dangerous in environments where administrative access is compromised. The vulnerability's classification as easily exploitable indicates that the attack vector is straightforward and does not require extensive technical expertise to execute successfully.
The operational impact of CVE-2019-2589 extends beyond simple service disruption to potentially causing complete system denial of service through repeated crashes or hangs. This availability impact represents a significant threat to database operations since MySQL servers are often critical infrastructure components supporting business applications. When exploited, the vulnerability can cause the MySQL server to become unresponsive or repeatedly crash, effectively rendering database services unavailable to legitimate users and applications. The CVSS 3.0 score of 4.9 reflects the moderate to high severity of this availability impact, particularly when considering that the attack requires only network access and already possesses high privileges.
From a cybersecurity perspective, this vulnerability aligns with CWE-284, which addresses improper access control in software systems. The flaw demonstrates how insufficient privilege validation can create pathways for privilege escalation attacks, allowing attackers to compromise system availability even when they do not have full administrative access. The attack pattern corresponds to techniques described in the MITRE ATT&CK framework under the privilege escalation and denial of service categories, where attackers leverage existing access to cause system instability. Organizations should note that this vulnerability represents a persistent threat that requires immediate attention due to its potential for causing complete service disruption.
Mitigation strategies for CVE-2019-2589 primarily involve upgrading to MySQL Server versions 8.0.16 or later, where the privilege handling mechanisms have been properly addressed. Additionally, organizations should implement network segmentation and access controls to limit exposure to only necessary network protocols and reduce the attack surface. Regular security assessments and monitoring for unauthorized access attempts should be conducted to detect potential exploitation attempts. The vulnerability serves as a reminder of the importance of maintaining up-to-date software versions and implementing proper access control policies to prevent unauthorized privilege escalation and system compromise.