CVE-2024-49003 in SQL Server
Summary
by MITRE • 11/12/2024
SQL Server Native Client Remote Code Execution Vulnerability
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Analysis
by VulDB Data Team • 06/08/2026
The SQL Server Native Client remote code execution vulnerability represents a critical security flaw that allows attackers to execute arbitrary code on affected systems through specially crafted SQL commands. This vulnerability affects Microsoft SQL Server Native Client components that handle database connections and query execution, creating a pathway for malicious actors to gain unauthorized access to database servers and potentially escalate privileges within the network infrastructure. The flaw stems from improper input validation and memory handling within the client libraries that process SQL statements, particularly when dealing with malformed or unexpected data structures during query execution.
The technical implementation of this vulnerability involves buffer overflows and memory corruption issues that occur when the SQL Server Native Client processes specific SQL commands or data types. Attackers can exploit these weaknesses by crafting malicious SQL queries that trigger memory corruption during processing, allowing them to overwrite critical memory locations and inject malicious code. The vulnerability typically manifests when the client library fails to properly validate input parameters or when it encounters unexpected data structures that cause it to jump to unintended code paths. This type of flaw falls under the CWE-121 buffer overflow category and can be classified as a remote code execution vulnerability under the MITRE ATT&CK framework's T1059.007 technique for command and scripting interpreter.
The operational impact of this vulnerability extends far beyond simple data access breaches, as successful exploitation can lead to complete system compromise and data exfiltration. Database administrators and security professionals face significant challenges in mitigating this threat since the vulnerability can be exploited remotely without authentication, making it particularly dangerous in environments where database servers are accessible from the internet or poorly secured internal networks. Organizations may experience unauthorized data access, data modification, or complete system takeover, depending on the privileges of the compromised database account. The vulnerability also enables attackers to establish persistence mechanisms and potentially move laterally within the network, as database servers often contain sensitive information and may be connected to other critical systems.
Mitigation strategies for this vulnerability require immediate patching of affected systems with the latest security updates from Microsoft, as well as implementing network segmentation and access controls to limit exposure. Security teams should monitor network traffic for suspicious SQL query patterns and implement database activity monitoring solutions to detect potential exploitation attempts. The implementation of least privilege principles for database accounts, along with regular security audits and penetration testing, helps reduce the attack surface and potential impact of successful exploitation. Organizations should also consider deploying intrusion detection systems and configuring firewall rules to restrict access to database ports and services, particularly in environments where the SQL Server Native Client components are exposed to untrusted networks. Additionally, regular security training for database administrators and development teams helps ensure proper input validation practices are implemented in applications that interact with SQL Server components.