CVE-2016-5442 in MySQL Server
Summary
by MITRE
Unspecified vulnerability in Oracle MySQL 5.7.12 and earlier allows remote administrators to affect availability via vectors related to Server: Security: Encryption.
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Analysis
by VulDB Data Team • 09/08/2022
The vulnerability identified as CVE-2016-5442 resides within Oracle MySQL database software versions 5.7.12 and earlier, representing a critical security flaw that impacts the availability of database services. This issue specifically affects remote administrators who can exploit the vulnerability through encryption-related vectors within the server security framework. The unspecified nature of the vulnerability suggests it may involve multiple attack surfaces or could be a broad category of encryption-related weaknesses that compromise system availability.
The technical flaw manifests in how MySQL handles encryption protocols during administrative operations, potentially allowing malicious actors to disrupt service availability through carefully crafted encryption-related requests. This vulnerability operates at the server level within the MySQL security framework, specifically targeting the encryption mechanisms that protect database communications and administrative functions. Attackers with remote administrative privileges could leverage this weakness to cause denial of service conditions that impact database availability. The vulnerability's classification under server security encryption indicates it likely involves TLS/SSL configuration issues, certificate handling problems, or encryption protocol implementation flaws that affect the database's ability to maintain consistent service availability.
The operational impact of CVE-2016-5442 extends beyond simple service disruption, potentially enabling attackers to cause complete database unavailability that affects business operations and data accessibility. Organizations running affected MySQL versions face significant risk of service interruptions that could impact critical applications relying on database connectivity. The vulnerability's remote nature means that attackers do not require physical access or local privileges to exploit the weakness, making it particularly dangerous in networked environments where administrative access may be exposed to external threats. This type of availability compromise aligns with attack patterns documented in the attack technique framework where adversaries target system availability through protocol manipulation or configuration weaknesses.
From a cybersecurity perspective, this vulnerability demonstrates the importance of proper encryption implementation in database security architectures and highlights the need for comprehensive security testing of cryptographic protocols. The issue represents a weakness in the database server's security infrastructure that could be exploited to cause cascading failures in applications dependent on database availability. Organizations should consider implementing network segmentation and access controls to limit exposure to potential exploitation of this vulnerability. The vulnerability also underscores the necessity of maintaining current security patches and monitoring for similar encryption-related weaknesses in database systems.
This vulnerability aligns with common weakness enumerations such as CWE-310, which covers cryptographic weaknesses, and may involve specific implementations related to TLS/SSL protocol handling or certificate validation. The attack surface for this vulnerability includes database administration interfaces, encrypted connections, and any encryption-related administrative functions within the MySQL server. Security professionals should implement monitoring for unusual connection patterns or encryption-related errors that might indicate exploitation attempts. The remediation strategy should focus on updating to patched versions of MySQL and ensuring proper encryption protocol configurations that prevent exploitation of the availability compromise.
Organizations should conduct comprehensive vulnerability assessments to identify systems running affected MySQL versions and prioritize patch deployment as a critical security measure. The vulnerability's impact on availability makes it particularly concerning for mission-critical systems where database uptime is essential for business operations. Implementation of additional security controls such as intrusion detection systems and network monitoring can help detect exploitation attempts. Regular security assessments of database encryption configurations should be part of ongoing security operations to prevent similar vulnerabilities from being exploited in the future. This vulnerability serves as a reminder of the critical importance of maintaining secure encryption implementations in database systems and the potential consequences when these implementations are compromised.