CVE-2016-5436 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: InnoDB.
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Analysis
by VulDB Data Team • 09/08/2022
The vulnerability identified as CVE-2016-5436 represents a critical availability threat within Oracle MySQL database systems affecting versions 5.7.12 and earlier. This weakness specifically targets the InnoDB storage engine component of the MySQL server, creating potential for remote administrators to disrupt system operations and compromise service availability. The unspecified nature of the vulnerability description suggests a complex underlying issue that requires careful analysis of the database server's behavior under specific conditions.
The technical flaw manifests within the Server: InnoDB subsystem where malicious actors with administrative privileges can exploit a weakness that leads to system instability and potential denial of service conditions. This vulnerability operates at the core database engine level, affecting how InnoDB handles certain operations and resource management. The attack vector requires remote access with administrative capabilities, making it particularly concerning as it allows attackers to manipulate database availability from external positions. The flaw likely involves improper handling of database transactions, resource allocation, or internal server processes that govern InnoDB's operation.
From an operational impact perspective, this vulnerability creates significant risk for database environments where MySQL serves as a critical backend service. When exploited, the vulnerability can cause database server crashes, forced restarts, or complete service unavailability that affects all applications dependent on that database system. Organizations may experience extended downtime, data access interruptions, and potential loss of business continuity. The impact extends beyond simple service disruption as database availability issues can cascade through entire application ecosystems that rely on consistent database connectivity and performance.
Security professionals should prioritize immediate remediation through Oracle's official patches and updates for affected MySQL versions. The vulnerability aligns with CWE-119 which addresses memory safety issues in database systems, and may map to ATT&CK techniques involving privilege escalation and availability disruption. Organizations should implement network segmentation to limit administrative access to database servers, employ robust monitoring solutions to detect anomalous database behavior, and maintain comprehensive backup and recovery procedures. Additionally, regular security assessments should verify that patched systems remain secure against similar vulnerabilities and that proper access controls are maintained to prevent unauthorized administrative access to database systems.