CVE-2015-0511 in MySQL Server
Summary
by MITRE
Unspecified vulnerability in Oracle MySQL Server 5.6.23 and earlier allows remote authenticated users to affect availability via unknown vectors related to Server : SP.
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Analysis
by VulDB Data Team • 12/02/2024
The vulnerability identified as CVE-2015-0511 represents a significant security flaw within Oracle MySQL Server versions 5.6.23 and earlier, specifically affecting the Server : SP component. This issue falls under the category of availability disruption, where authenticated remote attackers can exploit unspecified vectors to compromise system availability. The vulnerability's classification as unspecified indicates that the exact technical mechanisms remain undisclosed, which is common with certain types of availability-related flaws that may involve resource exhaustion, denial of service conditions, or process termination scenarios. The affected Server : SP component suggests that stored procedures are at the core of this vulnerability, potentially involving improper handling of user-supplied data or execution flows within the stored procedure framework.
The technical implications of this vulnerability extend beyond simple denial of service scenarios, as it represents a potential attack surface that could be leveraged to cause more severe availability impacts. Stored procedures in MySQL systems are designed to execute complex database operations and often contain critical business logic, making them prime targets for exploitation. The fact that this vulnerability affects authenticated users indicates that attackers must first establish valid credentials, but once authenticated, they can potentially disrupt database operations through malicious stored procedure execution or manipulation. This type of vulnerability aligns with CWE-400, which covers unspecified errors in resource management, and may also relate to CWE-119, concerning weaknesses in memory management that could lead to availability disruption.
From an operational standpoint, this vulnerability presents a serious risk to database availability and system stability, particularly in environments where MySQL serves as a critical backend component for applications. The remote nature of the attack means that unauthorized parties can potentially compromise availability without physical access to the system, making it particularly dangerous in cloud environments or distributed systems. Organizations running affected MySQL versions may experience service interruptions, data access denial, or complete system unavailability during exploitation attempts. The impact is amplified when considering that many enterprise applications rely heavily on stored procedures for their database operations, making the availability of these components critical to overall system functionality.
Mitigation strategies for CVE-2015-0511 should prioritize immediate patching of affected MySQL Server installations to the latest available versions that contain fixes for this vulnerability. Organizations should implement network segmentation and access controls to limit authentication opportunities for unauthorized users, while also monitoring for suspicious stored procedure activity that might indicate exploitation attempts. The principle of least privilege should be enforced for database accounts, ensuring that users have only the necessary permissions to perform their required functions. Additionally, implementing comprehensive logging and monitoring of stored procedure executions can help detect anomalous behavior that might indicate exploitation attempts. This vulnerability's characteristics align with ATT&CK technique T1499, which covers network denial of service attacks, and may also involve techniques related to privilege escalation or resource consumption that could further amplify the availability impact. Organizations should also consider implementing database activity monitoring solutions that can detect and alert on potentially malicious stored procedure usage patterns.