CVE-2016-0505 in MySQL Server
Summary
by MITRE
Unspecified vulnerability in Oracle MySQL 5.5.46 and earlier, 5.6.27 and earlier, and 5.7.9 allows remote authenticated users to affect availability via unknown vectors related to Options.
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Analysis
by VulDB Data Team • 07/05/2022
The vulnerability identified as CVE-2016-0505 represents a significant security weakness within Oracle MySQL database systems affecting multiple version ranges including 5.5.46 and earlier, 5.6.27 and earlier, and 5.7.9 and earlier. This issue falls under the category of availability impact, meaning that malicious actors can potentially disrupt database services and compromise system uptime. The vulnerability specifically relates to options handling within the MySQL implementation, though the exact technical mechanism remains unspecified in the initial description. Such unspecified nature often indicates that the flaw involves complex interactions between multiple system components or subtle implementation details that may not be immediately obvious to security researchers.
The technical flaw manifests in how MySQL processes certain option parameters within its database management framework, creating potential attack vectors that authenticated remote users can exploit to cause system instability or complete service disruption. From a cybersecurity perspective, this vulnerability represents a serious concern because it allows attackers to leverage legitimate authentication mechanisms to initiate denial-of-service attacks against database servers. The fact that this affects multiple major version lines demonstrates the widespread nature of the issue and suggests that the underlying flaw is fundamental to the option processing logic rather than being isolated to a specific release. This type of vulnerability typically aligns with CWE-119 which addresses weaknesses in memory handling and buffer overflows, though the exact classification depends on the specific implementation details of the option processing mechanism.
Operationally, the impact of CVE-2016-0505 can be severe for organizations relying on MySQL databases, as it enables authenticated attackers to potentially bring down critical database services without requiring elevated privileges beyond legitimate user access. The remote nature of the exploit means that attackers can initiate attacks from external networks, making the vulnerability particularly dangerous in environments where database servers are exposed to the internet or less secure network zones. Organizations may experience significant downtime, data accessibility issues, and potential business disruption when such attacks occur, especially in mission-critical applications where database availability is paramount. The vulnerability can be particularly problematic in cloud environments or multi-tenant systems where database availability directly impacts service level agreements and customer satisfaction.
Mitigation strategies for CVE-2016-0505 should focus on immediate patching of affected MySQL versions to the latest available releases that contain fixes for the option processing flaws. Organizations should implement network segmentation to limit access to database servers and ensure that only authorized users with legitimate business needs can access MySQL instances. Additionally, monitoring systems should be enhanced to detect unusual patterns in database connection attempts or option parameter usage that might indicate exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify similar issues within the broader database ecosystem. Implementing principle of least privilege access controls and maintaining up-to-date security patches aligns with ATT&CK framework techniques targeting credential access and defense evasion, ensuring comprehensive protection against both current and potential future exploitation attempts. Organizations should also consider implementing database activity monitoring solutions that can detect anomalous option parameter usage patterns and alert security teams to potential exploitation attempts.