CVE-2016-3424 in MySQL Server
Summary
by MITRE
Unspecified vulnerability in Oracle MySQL 5.7.12 and earlier allows remote administrators to affect availability via vectors related to Server: Optimizer.
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Analysis
by VulDB Data Team • 09/08/2022
The vulnerability identified as CVE-2016-3424 represents a critical availability issue within Oracle MySQL database systems affecting versions 5.7.12 and earlier. This weakness resides within the server optimizer component of the database management system, specifically impacting remote administrative operations that could potentially disrupt service availability. The unspecified nature of the vulnerability indicates that the exact technical mechanism remains undisclosed, though it clearly demonstrates the potential for remote attackers with administrative privileges to cause system disruption.
This vulnerability operates within the context of database server optimization processes where the MySQL server performs query optimization routines to determine the most efficient execution paths for database operations. The flaw manifests when administrators execute certain administrative commands or when the server processes specific query patterns that trigger problematic optimizer behaviors. The attack vector specifically targets the server component responsible for query optimization, suggesting that malicious or malformed administrative operations could cause the MySQL server to become unresponsive or crash entirely.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise the entire database infrastructure. When exploited, the vulnerability could allow an authenticated remote administrator to cause the MySQL server to become unavailable, effectively denying legitimate users access to database resources. This type of availability compromise represents a significant risk in production environments where database uptime is critical for business operations and can result in substantial financial losses and operational disruption.
From a cybersecurity perspective, this vulnerability aligns with CWE-119 which describes weaknesses in memory handling and buffer operations that can lead to system instability. The attack pattern suggests potential exploitation through the ATT&CK framework's privilege escalation and denial of service techniques, where an attacker with administrative access could leverage this weakness to cause system-wide availability issues. Organizations should consider implementing network segmentation and access controls to limit administrative exposure while maintaining proper patch management protocols to address this vulnerability through official Oracle security updates.
The remediation approach requires immediate application of Oracle's security patches and updates to MySQL versions that have addressed this optimizer-related availability issue. System administrators should conduct thorough testing of patches in staging environments before deployment to ensure compatibility with existing database operations and applications. Additionally, monitoring systems should be enhanced to detect unusual administrative activity patterns that might indicate exploitation attempts, particularly around optimizer-related query execution and server configuration changes. Regular security assessments and vulnerability scanning should be implemented to identify similar weaknesses in database configurations and ensure comprehensive protection against similar availability threats.