CVE-2014-0427 in MySQL Server
Summary
by MITRE
Unspecified vulnerability in the MySQL Server component in Oracle MySQL 5.6.13 and earlier allows remote authenticated users to affect availability via vectors related to FTS.
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Analysis
by VulDB Data Team • 06/08/2021
The vulnerability identified as CVE-2014-0427 resides within the MySQL Server component of Oracle MySQL versions 5.6.13 and earlier, specifically impacting the Full-Text Search (FTS) functionality. This unspecified weakness represents a significant concern for database administrators and security professionals due to its potential to disrupt service availability. The vulnerability affects remote authenticated users who can exploit this flaw to compromise the system's operational integrity. The FTS component in MySQL provides advanced text search capabilities enabling users to perform complex searches across large datasets, making it a critical feature for many database applications. However, the flaw within this functionality creates an attack surface that adversaries can leverage to cause service disruption. The vulnerability's classification as affecting availability indicates that successful exploitation could lead to denial of service conditions where legitimate users cannot access database services. This type of vulnerability is particularly dangerous in production environments where database availability is crucial for business operations and application functionality. The impact extends beyond simple service interruption as it could potentially allow attackers to exhaust system resources or trigger memory corruption issues within the MySQL server process. Security researchers have classified this issue under the broader category of availability disruption vulnerabilities, which aligns with common attack patterns targeting database systems to cause operational downtime.
The technical nature of this vulnerability stems from improper handling of certain FTS operations within the MySQL Server implementation. While the exact technical details remain unspecified in the CVE description, such vulnerabilities typically involve memory management issues, buffer overflows, or resource exhaustion conditions that occur during FTS processing. The fact that this affects authenticated users suggests that attackers must first establish valid credentials to exploit the vulnerability, which reduces the attack surface compared to unauthenticated exploits. However, this does not diminish the severity as authenticated users may include legitimate database administrators or application users with sufficient privileges. The FTS functionality in MySQL Server involves complex indexing and search algorithms that process large volumes of text data, creating potential points of failure where malformed input or specific parameter combinations could trigger the underlying flaw. This vulnerability demonstrates the challenges inherent in developing robust database search capabilities where complex text processing algorithms must handle diverse input patterns without causing system instability. The attack vector specifically relates to FTS operations, indicating that the flaw manifests when the server processes certain full-text search queries or maintains FTS indexes. Such vulnerabilities often arise from insufficient input validation or improper resource management during complex database operations, particularly those involving text processing and indexing.
The operational impact of CVE-2014-0427 extends beyond immediate service disruption to potentially compromise the overall reliability and security posture of MySQL installations. Organizations utilizing affected MySQL versions face risks of unplanned downtime, data access interruptions, and potential performance degradation during exploitation attempts. The vulnerability's remote nature means that attackers located outside the local network can target systems, increasing the attack surface and making it more challenging to prevent unauthorized access. Database administrators must consider that successful exploitation could lead to complete service unavailability, requiring manual intervention to restore database operations. This type of availability compromise directly affects business continuity and can result in significant financial losses due to extended downtime periods. The vulnerability affects systems where FTS functionality is actively used, making it particularly concerning for applications that rely heavily on text search capabilities such as content management systems, e-commerce platforms, and document repositories. Organizations may experience cascading effects where database unavailability impacts dependent applications and services, amplifying the overall business impact. The security implications extend to potential information disclosure or system compromise if the vulnerability allows for privilege escalation or code execution. This vulnerability highlights the importance of maintaining up-to-date database software and implementing proper access controls to limit the potential impact of such flaws.
Mitigation strategies for CVE-2014-0427 primarily focus on immediate patching and implementation of access controls to reduce the attack surface. Organizations should prioritize upgrading to MySQL versions that contain the necessary security fixes, as Oracle typically releases patches for identified vulnerabilities in their database products. The recommended approach involves applying the latest security updates from Oracle MySQL, which address the specific FTS-related issues that cause the availability disruption. System administrators should conduct thorough testing of patches in non-production environments before deployment to ensure compatibility with existing applications and configurations. Additionally, implementing network-level access controls can help limit who can access the database server, reducing the likelihood of exploitation by unauthorized users. Database administrators should consider disabling FTS functionality if it is not essential for specific applications, as this eliminates the attack vector entirely. Monitoring systems should be configured to detect unusual database activity patterns that might indicate exploitation attempts, particularly around FTS operations. The implementation of proper authentication mechanisms and privilege management ensures that only authorized users can access database functions that might be vulnerable. Organizations should also establish incident response procedures that include specific steps for handling database availability issues, ensuring rapid identification and resolution of potential exploitation attempts. Regular vulnerability assessments and penetration testing can help identify similar weaknesses in database configurations and applications that might be exploited in conjunction with this vulnerability. The mitigation approach aligns with industry best practices for database security management and follows the principle of least privilege, which reduces the potential impact of successful attacks. This vulnerability serves as a reminder of the critical importance of maintaining current security patches and implementing comprehensive database security strategies that protect against both known and emerging threats.