CVE-2016-5444 in MySQL Server
Summary
by MITRE
Unspecified vulnerability in Oracle MySQL 5.5.48 and earlier, 5.6.29 and earlier, and 5.7.11 and earlier and MariaDB before 5.5.49, 10.0.x before 10.0.25, and 10.1.x before 10.1.14 allows remote attackers to affect confidentiality via vectors related to Server: Connection.
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Analysis
by VulDB Data Team • 09/09/2022
The vulnerability identified as CVE-2016-5444 represents a significant security weakness in database systems that has far-reaching implications for data confidentiality. This issue affects multiple versions of both Oracle MySQL and MariaDB database platforms, spanning across several major release lines including MySQL 5.5, 5.6, and 5.7, along with MariaDB versions prior to specific patch releases. The vulnerability resides within the server connection handling mechanisms, specifically within the MySQL protocol implementation that governs how database connections are established and maintained between client applications and database servers. The unspecified nature of the vulnerability description suggests that it involves complex interactions within the connection management layer that could potentially be exploited through various attack vectors.
The technical flaw manifests in the way MySQL and MariaDB handle connection-related operations, particularly when processing client requests that involve connection establishment, authentication, or data transmission. Attackers can leverage this vulnerability to potentially access confidential data that should otherwise remain protected within the database system. The connection-based nature of the vulnerability means that an attacker who can establish a network connection to the database server might be able to exploit this weakness to extract sensitive information. This type of vulnerability typically falls under the CWE-200 category for "Information Exposure" and can be mapped to ATT&CK technique T1005 which involves data from local system storage. The flaw likely involves improper handling of connection state information or insufficient validation of connection parameters that could allow unauthorized data access through carefully crafted connection requests.
The operational impact of CVE-2016-5444 extends beyond simple data theft, as it represents a fundamental weakness in the database security architecture that could enable attackers to bypass normal access controls and authentication mechanisms. Organizations running affected database versions face significant risks including unauthorized data access, potential data breaches, and compromise of sensitive information stored within their database systems. The vulnerability affects database servers that are commonly used in enterprise environments, web applications, and any system where MySQL or MariaDB is employed for data storage and retrieval. Attackers can potentially exploit this weakness without requiring elevated privileges, making it particularly dangerous as it could be leveraged by threat actors with minimal initial access. The vulnerability's presence in multiple versions across different database platforms means that organizations must conduct comprehensive inventory assessments to identify all affected systems and implement appropriate remediation measures.
Mitigation strategies for CVE-2016-5444 should prioritize immediate patching of all affected database versions to ensure that the underlying connection handling mechanisms are properly secured. Organizations should implement network segmentation to limit direct access to database servers and employ additional security controls such as VPNs or bastion hosts to protect database connections. Database administrators should review and tighten connection policies, including implementing stronger authentication mechanisms and monitoring connection attempts for suspicious activity. The vulnerability's connection-based nature makes it particularly susceptible to exploitation through network-based attacks, so implementing proper firewall rules and access control lists becomes crucial. Additionally, organizations should consider implementing database activity monitoring solutions that can detect anomalous connection patterns or unauthorized access attempts that might indicate exploitation of this vulnerability. Regular vulnerability assessments and penetration testing should be conducted to identify potential exploitation vectors and ensure that all systems remain protected against similar threats. The remediation process must also include thorough testing of patched systems to ensure that the security updates do not introduce compatibility issues with existing applications or services that depend on the database infrastructure.