CVE-2015-0508 in MySQL Server
Summary
by MITRE
Unspecified vulnerability in Oracle MySQL Server 5.6.23 and earlier allows remote authenticated users to affect availability via unknown vectors related to Server : InnoDB, a different vulnerability than CVE-2015-0506.
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Analysis
by VulDB Data Team • 05/07/2022
The vulnerability identified as CVE-2015-0508 represents a critical availability threat within Oracle MySQL Server versions 5.6.23 and earlier, specifically impacting the InnoDB storage engine component. This weakness falls under the broader category of denial of service vulnerabilities that can be exploited by authenticated remote attackers, making it particularly concerning for database environments where access control is paramount. The vulnerability's classification as unspecified indicates that Oracle did not provide detailed technical specifics about the exact mechanism by which the availability impact occurs, though it is clearly distinct from the related CVE-2015-0506, which suggests separate attack vectors or exploitation methods.
The technical flaw resides within the Server : InnoDB subsystem of MySQL, which is responsible for managing database transactions, locking mechanisms, and storage operations. InnoDB's complex architecture handles concurrent access to database tables and maintains data integrity through various internal processes including buffer pool management, transaction log handling, and row-level locking. When an authenticated user can manipulate these underlying processes, they may be able to trigger conditions that cause the MySQL server to become unresponsive or crash entirely, thereby disrupting database availability for legitimate users. This vulnerability specifically targets the server's ability to maintain consistent operation under normal workload conditions.
From an operational standpoint, this vulnerability presents significant risks to database availability and business continuity. An authenticated attacker with access to the MySQL server can potentially cause service disruption by exploiting the InnoDB subsystem, leading to downtime that could affect applications dependent on database operations. The impact extends beyond simple server crashes to include potential data inconsistency issues and the need for manual intervention to restore services. Organizations running affected MySQL versions face the challenge of maintaining database availability while implementing patches, as any downtime during the update process could compound the business impact. The authentication requirement reduces the attack surface compared to unauthenticated vulnerabilities but does not eliminate the risk for environments where privileged accounts might be compromised.
Mitigation strategies should focus on immediate patching of affected MySQL versions to the latest available releases, which would contain fixes for the InnoDB subsystem vulnerabilities. Organizations should also implement network segmentation to limit access to database servers, enforce strict access controls, and monitor database server behavior for unusual patterns that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1499.004 for network denial of service and may relate to CWE-400 for unspecified resource management issues within database systems. Additionally, implementing database activity monitoring solutions can help detect anomalous behavior patterns that might precede or accompany exploitation attempts, providing early warning capabilities for potential attacks targeting database availability.