CVE-2016-5609 in MySQL Server
Summary
by MITRE
Unspecified vulnerability in Oracle MySQL 5.6.31 and earlier and 5.7.13 and earlier allows remote authenticated users to affect availability via vectors related to DML.
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Analysis
by VulDB Data Team • 09/27/2022
The vulnerability identified as CVE-2016-5609 represents a significant availability threat within Oracle MySQL database systems affecting versions 5.6.31 and earlier, as well as 5.7.13 and earlier. This unspecified flaw resides within the database management system's handling of Data Manipulation Language operations, which form the core of database interaction processes. The vulnerability specifically targets authenticated users who can leverage this weakness to disrupt database availability, making it particularly dangerous in production environments where database uptime is critical for business operations.
The technical nature of this vulnerability stems from improper handling of DML operations within the MySQL server architecture, creating potential for denial-of-service conditions that can render database services unavailable to legitimate users. The flaw operates at the database engine level where DML statements such as insert update and delete operations are processed, allowing attackers to craft specific queries that trigger unexpected behavior in the server's processing mechanisms. This type of vulnerability typically involves memory management issues or improper state handling during query execution that can cause the database server to crash or become unresponsive.
From an operational impact perspective this vulnerability creates substantial risk for organizations relying on MySQL databases for critical business functions. The ability for authenticated users to cause availability disruption means that both internal employees and external attackers with legitimate database access credentials could exploit this weakness. The attack vector requires only authentication to the database system which is often readily available in enterprise environments where database access is granted to multiple users for operational purposes. This makes the vulnerability particularly concerning as it can be exploited by malicious insiders or compromised accounts.
The vulnerability aligns with CWE-119 which describes weaknesses related to improper handling of memory or resources, and represents a denial-of-service condition that can be classified under ATT&CK technique T1499.3 for network denial of service. Organizations should implement immediate mitigation strategies including applying the latest Oracle security patches and updates, implementing network segmentation to limit database access, and establishing monitoring procedures to detect abnormal database behavior. Database administrators should also consider implementing connection limits and query timeouts to minimize the potential impact of exploitation attempts. The vulnerability underscores the importance of maintaining current security patches and implementing proper access controls to protect against authenticated attacks that can compromise database availability.