CVE-2024-48997 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 • 05/26/2026
This vulnerability affects the SQL Server Native Client component which is used by applications to connect to sql server databases. The flaw exists in how the native client processes certain network requests and handles memory operations during database connection establishment. Attackers can exploit this remote code execution vulnerability by sending specially crafted network packets to a vulnerable sql server instance that uses the native client for connections. The vulnerability stems from improper input validation and memory handling mechanisms within the native client library that fails to properly sanitize incoming data before processing. This allows malicious actors to execute arbitrary code on the target system with the privileges of the sql server service account, potentially leading to full system compromise and data exfiltration. The vulnerability is particularly dangerous because it can be exploited remotely without authentication, making it an attractive target for automated attacks. According to cwe standards this represents a classic buffer overflow vulnerability categorized under cwe-121 which involves insufficient control of a resource's boundaries. The attack vector aligns with attack technique t1210 in the attack framework which describes exploitation of remote services through network-based attacks. Organizations using sql server native client components are at risk regardless of whether they have sql server installed locally or are connecting to remote sql server instances through the native client. The impact extends beyond simple data theft as attackers can establish persistent backdoors, escalate privileges, and move laterally within the network infrastructure. The vulnerability affects multiple versions of sql server native client and can be exploited through various attack vectors including direct network connections, web applications that use sql server connections, or any application that relies on the native client for database connectivity. Security researchers have identified that the flaw manifests when the native client receives malformed data during the initial connection handshake process, specifically in the handling of authentication tokens and connection parameters. This vulnerability is particularly concerning in enterprise environments where sql server instances are commonly exposed to untrusted networks and where applications may not be properly patched or updated. The exploitation requires minimal privileges and can be automated through existing attack frameworks, making it a significant threat to organizations with inadequate patch management processes. Organizations should immediately implement network segmentation to isolate sql server instances, disable unnecessary sql server features, and ensure all systems are patched with the latest security updates from microsoft. The recommended mitigations include applying microsoft security patches, implementing network access controls, monitoring for suspicious network traffic patterns, and conducting regular vulnerability assessments of sql server environments. Additionally organizations should consider implementing application whitelisting policies and using database activity monitoring solutions to detect potential exploitation attempts. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and proper network segmentation practices to prevent successful exploitation of remote code execution vulnerabilities in database infrastructure components.