CVE-2016-0594 in MySQL Server
Summary
by MITRE
Unspecified vulnerability in Oracle MySQL 5.6.21 and earlier allows remote authenticated users to affect availability via vectors related to DML.
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Analysis
by VulDB Data Team • 07/05/2022
The vulnerability identified as CVE-2016-0594 represents a significant security flaw within Oracle MySQL database systems affecting versions 5.6.21 and earlier. This issue falls under the category of availability impact, meaning that malicious actors can potentially disrupt database operations and compromise system uptime. The vulnerability specifically relates to Data Manipulation Language operations within the MySQL database engine, making it particularly dangerous for production environments where database availability is critical for business operations. The unspecified nature of the vulnerability description indicates that the exact technical mechanism remains undisclosed, though it clearly involves a weakness in how MySQL processes DML statements from authenticated users.
The technical exploitation of this vulnerability occurs through authenticated user sessions, which means that attackers must first establish valid credentials to the MySQL system before they can leverage this flaw. This authentication requirement somewhat limits the scope of potential attackers but does not eliminate the threat entirely, as compromised accounts or legitimate users with elevated privileges could be exploited. The DML-related nature of the vulnerability suggests that operations such as insert, update, delete, and select commands may be affected, potentially leading to denial of service conditions where database operations become unresponsive or fail entirely. From a cybersecurity perspective, this vulnerability aligns with CWE-119, which addresses weaknesses in memory management and data handling that can lead to availability issues.
The operational impact of CVE-2016-0594 extends beyond simple service disruption, as database availability is fundamental to most enterprise applications and services. When authenticated users can manipulate database operations to cause availability issues, the potential for business disruption increases substantially. Organizations relying on MySQL for critical data operations face significant risk of data access delays, application timeouts, and complete service outages. The vulnerability particularly affects systems where database performance and uptime are paramount, such as financial services, e-commerce platforms, and healthcare systems where continuous database access is required for operational integrity. This issue demonstrates the importance of maintaining up-to-date database systems and implementing proper access controls to limit the potential impact of such vulnerabilities.
Organizations should prioritize immediate patching of affected MySQL versions to address this vulnerability, as Oracle has likely released security updates to resolve the issue. The remediation process should include comprehensive testing of patched systems to ensure that database functionality remains intact while addressing the availability concerns. Additionally, implementing network segmentation and access controls can help limit the impact of potential exploitation by restricting unauthorized access to database systems. Monitoring and logging of database activities should be enhanced to detect suspicious DML operations that might indicate exploitation attempts. This vulnerability underscores the necessity of following security best practices including regular vulnerability assessments, patch management programs, and adherence to the principle of least privilege for database access. The ATT&CK framework would categorize this vulnerability under the T1489 technique for "Service Stop" and potentially T1070 for "Indicator Removal on Host" if attackers attempt to cover their tracks after exploitation.