CVE-2012-3156 in MySQL Server
Summary
by MITRE
unspecified vulnerability in the mysql server component in oracle mysql 5.5.25 and earlier allows remote authenticated users to affect availability via unknown vectors related to server.
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Analysis
by VulDB Data Team • 04/18/2021
The vulnerability identified as CVE-2012-3156 represents a significant availability threat within Oracle MySQL server components affecting versions 5.5.25 and earlier. This unspecified flaw exists within the server component of the MySQL database system, which is widely deployed across enterprise environments and web applications. The vulnerability specifically targets authenticated remote users who can potentially disrupt service availability through unspecified attack vectors. Given MySQL's pervasive use in critical applications, this vulnerability poses substantial risk to database availability and system stability. The affected versions include the widely used 5.5.x series, which represents a critical attack surface for malicious actors seeking to exploit database systems. The unspecified nature of the attack vectors suggests the vulnerability may involve multiple potential pathways, making comprehensive detection and mitigation challenging for security teams.
The technical nature of this vulnerability stems from the server component's handling of authenticated connections, indicating that the flaw likely involves improper state management or resource handling during legitimate user sessions. According to CWE classification, this vulnerability could relate to CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer, or CWE-400 Uncontrolled Resource Consumption, both of which can lead to denial of service conditions. The attack vector involves remote authenticated users, which aligns with ATT&CK technique T1499.004 for Network Denial of Service, where adversaries leverage legitimate access to cause system unavailability. The vulnerability's impact on availability suggests that successful exploitation could result in database service disruption, preventing authorized users from accessing critical data resources. This type of vulnerability typically involves resource exhaustion, memory corruption, or improper error handling that causes the server process to terminate or become unresponsive.
The operational impact of CVE-2012-3156 extends beyond simple service disruption, potentially affecting business continuity and data availability for organizations relying on MySQL databases. When exploited, this vulnerability could lead to extended downtime for database services, impacting applications that depend on MySQL for data persistence. The authentication requirement means that attackers must first obtain valid credentials, but once achieved, they can leverage this vulnerability to cause significant operational damage. Organizations using affected MySQL versions face potential financial losses due to service interruptions, data access delays, and the costs associated with emergency patching and incident response. The vulnerability affects the core database server functionality, meaning that even minor exploitation attempts could result in complete service outages. Security teams must consider the broader implications for their incident response procedures and may need to implement additional monitoring for unusual database server behavior or resource consumption patterns.
Mitigation strategies for CVE-2012-3156 should prioritize immediate patching of affected MySQL server installations to the latest available versions. Organizations should implement network segmentation and access controls to limit the attack surface, ensuring that only necessary systems can connect to database servers. Regular vulnerability assessments and penetration testing should include checks for outdated MySQL versions to identify unpatched systems. Monitoring should focus on database server resource utilization, connection patterns, and any unusual behavior that might indicate exploitation attempts. Network-based intrusion detection systems should be configured to alert on anomalous database traffic patterns. Additionally, implementing proper access controls and credential management practices can reduce the risk of unauthorized access that could lead to exploitation. The remediation process should include thorough testing of patches in staging environments before deployment to production systems, ensuring that critical database services remain operational throughout the update process. Organizations should also consider implementing database activity monitoring tools that can detect unusual patterns potentially associated with exploitation attempts.