CVE-2012-1734 in MySQL Server
Summary
by MITRE
Unspecified vulnerability in Oracle MySQL Server 5.1.62 and earlier, and 5.5.23 and earlier, allows remote authenticated users to affect availability via unknown vectors related to Server Optimizer.
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Analysis
by VulDB Data Team • 03/26/2021
The vulnerability identified as CVE-2012-1734 represents a critical availability threat within Oracle MySQL Server implementations across multiple version ranges. This flaw exists within the server optimizer component of the database system, specifically affecting MySQL Server versions 5.1.62 and earlier, as well as 5.5.23 and earlier. The vulnerability's classification as unspecified indicates that the exact technical mechanism remains undisclosed, though its impact on system availability has been documented. The affected components operate within the database engine's query optimization layer, which processes and optimizes SQL statements before execution. This optimizer functionality serves as a critical subsystem that directly influences database performance and stability, making it a prime target for attackers seeking to disrupt database services.
The technical nature of this vulnerability stems from the server optimizer's handling of specific query processing scenarios that can trigger abnormal behavior in the database engine. While the precise vector remains unspecified, the impact manifests as availability disruption, suggesting that maliciously crafted database operations or query patterns can cause the MySQL server to become unresponsive or crash entirely. The vulnerability's remote and authenticated nature indicates that attackers must possess valid database credentials to exploit this weakness, though this requirement does not significantly reduce the threat level given that legitimate users typically maintain persistent database connections. The optimizer component's role in processing complex queries means that this vulnerability can potentially affect a wide range of database operations, particularly those involving intricate SQL constructs or large data sets. This characteristic places the vulnerability within the scope of CWE-119, which addresses memory safety issues, and potentially CWE-476, concerning null pointer dereferences, though the exact technical manifestation remains unspecified.
The operational impact of CVE-2012-1734 extends beyond simple service disruption to encompass broader business continuity concerns for organizations relying on MySQL database infrastructure. When exploited, this vulnerability can cause complete database server unavailability, resulting in application downtime and potential data access interruptions. The remote exploitation capability means that attackers can target systems from external networks, potentially affecting database servers exposed to the internet or accessible through network boundaries. Organizations utilizing MySQL Server in production environments face significant risk exposure, as database availability directly impacts application functionality and user access. The authenticated requirement reduces the attack surface compared to fully unauthenticated vulnerabilities, but does not eliminate the threat since database credentials are often maintained in applications and system configurations. The optimizer's role in query processing means that even routine database operations could trigger this vulnerability, making it particularly dangerous for systems handling high volumes of database transactions. This vulnerability's potential to cause denial of service aligns with ATT&CK technique T1499, specifically targeting availability through service disruption.
Mitigation strategies for CVE-2012-1734 focus primarily on upgrading to patched versions of Oracle MySQL Server, as the vulnerability exists within specific version ranges that have been addressed through subsequent releases. Organizations should prioritize immediate patching of all affected systems, particularly those with database servers exposed to external networks or accessible through critical application interfaces. Database administrators should implement monitoring solutions to detect anomalous query patterns that might indicate exploitation attempts, though the unspecified nature of the vulnerability makes proactive detection challenging. Network segmentation and access controls should be reinforced to limit database server exposure, reducing the attack surface for potential exploitation. Additionally, implementing database firewalls or query filtering mechanisms can help prevent malicious query patterns from reaching the vulnerable optimizer component. Regular vulnerability assessments and penetration testing should be conducted to identify systems running vulnerable versions of MySQL Server, while maintaining updated inventory records of database software versions across the organization. The patching process should include thorough testing in staging environments to ensure compatibility with existing applications and database operations before deployment to production systems. Organizations should also consider implementing automated patch management solutions to maintain up-to-date database server installations and reduce the window of vulnerability exposure.