CVE-2016-8287 in MySQL Server
Summary
by MITRE
Unspecified vulnerability in Oracle MySQL 5.7.13 and earlier allows remote administrators to affect availability via vectors related to Server: Replication.
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Analysis
by VulDB Data Team • 09/25/2024
The vulnerability identified as CVE-2016-8287 represents a critical weakness in Oracle MySQL database systems affecting versions 5.7.13 and earlier. This issue specifically targets the replication functionality within the MySQL server component, creating potential for significant service disruption. The vulnerability falls under the category of availability impact, meaning that successful exploitation could lead to denial of service conditions that prevent legitimate users from accessing database services. The unspecified nature of the exact flaw within the replication subsystem suggests a complex underlying issue that affects the fundamental operation of MySQL's replication mechanisms.
The technical flaw manifests through vectors related to server replication operations, indicating that the vulnerability occurs during the replication process where database servers synchronize data with each other. This type of vulnerability is particularly dangerous because it can be exploited by remote administrators who may not necessarily require direct system access. The replication functionality in MySQL typically involves master-slave configurations where data changes on the master server are propagated to one or more slave servers. When this process is compromised, it can result in replication failures that cascade into broader system availability issues.
From an operational impact perspective, this vulnerability creates substantial risk for database environments that rely heavily on replication for high availability, disaster recovery, or load distribution purposes. Organizations using MySQL versions prior to 5.7.13 may experience complete replication breakdowns, leading to data inconsistency issues, service interruptions, and potential data loss scenarios. The remote exploitation capability means that attackers could potentially disrupt database operations from outside the network perimeter, making this vulnerability particularly concerning for externally accessible database servers. This vulnerability aligns with CWE-119 which addresses weaknesses in the representation or management of memory, and may also relate to CWE-400 which covers issues in resource management that could lead to denial of service conditions.
The attack surface for this vulnerability extends beyond simple availability disruption to include potential data integrity concerns. When replication processes fail or behave unpredictably, it can lead to inconsistent data states across the replicated database cluster. This scenario is particularly problematic in production environments where data consistency is paramount for business operations. The vulnerability's classification under the ATT&CK framework would likely map to the privilege escalation and denial of service tactics, as attackers could leverage this weakness to either gain unauthorized access to database resources or prevent legitimate access to database services. Organizations implementing MySQL replication for critical business applications face heightened risk of operational disruption.
Mitigation strategies for CVE-2016-8287 primarily focus on upgrading to patched versions of Oracle MySQL, specifically versions beyond 5.7.13 where the vulnerability has been addressed. System administrators should also implement network segmentation to limit access to database replication ports and consider disabling replication functionality if it is not essential for operations. Monitoring for unusual replication behavior and implementing robust intrusion detection systems can help identify exploitation attempts. Additionally, organizations should conduct thorough testing of patched versions in non-production environments before deployment to ensure compatibility with existing database configurations and applications. The vulnerability demonstrates the importance of maintaining current database software versions and implementing proper access controls around database administrative functions to prevent unauthorized modification of critical replication parameters.