CVE-2012-1696 in MySQL Server
Summary
by MITRE
Unspecified vulnerability in the MySQL Server component in Oracle MySQL 5.5.19 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 • 04/19/2017
The vulnerability identified as CVE-2012-1696 resides within the MySQL Server component of Oracle MySQL versions 5.5.19 and earlier, representing a critical availability threat that affects remote authenticated users. This unspecified flaw operates within the Server Optimizer subsystem, which is responsible for query optimization and execution planning in the database management system. The vulnerability's classification as affecting availability rather than confidentiality or integrity suggests that attackers can disrupt service operations without necessarily gaining unauthorized access to data or system privileges. The attack vector requires authentication, meaning that only users with valid credentials can exploit this weakness, though this limitation does not diminish its potential impact on system reliability and business continuity.
The technical nature of this vulnerability stems from the Server Optimizer's handling of specific query execution paths that can lead to resource exhaustion or system instability. While the exact implementation details remain unspecified in the CVE description, such optimizer-related vulnerabilities typically involve memory management issues, stack overflow conditions, or infinite loop scenarios that occur when processing certain query structures. The Server Optimizer is a critical component that interprets SQL statements and determines the most efficient execution plan, making it a prime target for attackers seeking to disrupt database operations. This vulnerability's potential for causing availability issues aligns with common patterns seen in database system exploits where computational resources become consumed or system processes become unresponsive due to flawed optimization logic.
The operational impact of CVE-2012-1696 extends beyond simple service disruption to potentially compromise entire database infrastructure reliability. When exploited, this vulnerability can cause MySQL server processes to crash, become unresponsive, or consume excessive system resources, leading to denial of service conditions that affect all database users and applications dependent on the affected system. The authentication requirement limits the attack scope to legitimate users, but this also means that compromised accounts or insider threats can leverage this vulnerability effectively. Organizations running affected MySQL versions face significant operational risks including data access interruptions, application downtime, and potential financial losses due to service unavailability. The vulnerability's presence in MySQL 5.5.19 and earlier versions indicates that it likely existed across multiple releases, making widespread exposure probable among database administrators who have not updated their systems.
Mitigation strategies for this vulnerability primarily focus on immediate patching and system updates to address the underlying Server Optimizer flaw. Organizations should prioritize upgrading to MySQL versions that have been patched to resolve this specific vulnerability, typically those released after the vulnerability disclosure. System administrators should implement monitoring solutions to detect unusual resource consumption patterns or process behavior that might indicate exploitation attempts. Access controls and authentication mechanisms should remain robust to prevent unauthorized exploitation, though the vulnerability's authentication requirement means that account compromise poses a direct threat. Database administrators should also consider implementing query execution limits and resource allocation controls to minimize the impact of potential exploitation attempts. The vulnerability's classification as affecting availability aligns with common attack patterns documented in the attack technique framework where service disruption represents a primary objective for attackers seeking to cause operational damage. Security teams should also review and update their incident response procedures to address potential availability impacts from this specific vulnerability category, ensuring that database availability remains a priority in overall security posture management.