CVE-2024-28932: ODBC Driver for SQL Server RCE Flaw

CVE-2024-28932 Overview

CVE-2024-28932 is a remote code execution vulnerability in the Microsoft ODBC Driver for SQL Server. The flaw is classified as a heap-based buffer overflow [CWE-122] and affects multiple Microsoft products that bundle the driver, including SQL Server 2019, SQL Server 2022, Visual Studio 2019, and Visual Studio 2022. An attacker who convinces a victim to connect a vulnerable client to a malicious SQL Server instance can trigger memory corruption and execute arbitrary code in the context of the calling process. Microsoft published the advisory on April 9, 2024. The EPSS score is 2.98%, placing this issue in the 86.7th percentile for exploitation likelihood.

Critical Impact

Successful exploitation results in remote code execution on the client process invoking the ODBC driver, with the same privileges as the connecting user.

Affected Products

• Microsoft ODBC Driver for SQL Server (Windows, Linux, macOS)
• Microsoft SQL Server 2019 and SQL Server 2022 (x64)
• Microsoft Visual Studio 2019 and Visual Studio 2022

Discovery Timeline

• 2024-04-09 - CVE-2024-28932 published to NVD
• 2024-04-09 - Microsoft releases security advisory and patch
• 2025-01-14 - Last updated in NVD database

Technical Details for CVE-2024-28932

Vulnerability Analysis

The vulnerability resides in the Microsoft ODBC Driver for SQL Server, the client-side component applications use to communicate with SQL Server instances over the Tabular Data Stream (TDS) protocol. The defect is a heap-based buffer overflow [CWE-122] triggered while the client parses server-supplied response data. An attacker who controls a SQL Server endpoint can return malformed TDS structures that exceed the driver's allocated heap buffers. The overflow corrupts adjacent heap metadata and application objects, enabling code execution within the process loading the driver.

Because the ODBC driver is embedded in SQL Server tooling, Visual Studio data tools, and any third-party application using the Microsoft Driver for SQL Server, the vulnerable code path can be reached from many host processes.

Root Cause

The driver fails to correctly validate length or boundary fields in TDS response packets before copying data into heap-allocated buffers. The missing bounds check allows a malicious server to dictate the size of data written into a fixed-size buffer, producing the heap overflow condition described in [CWE-122].

Attack Vector

The attack vector is network-based but requires user interaction. The victim must initiate or accept an ODBC connection to an attacker-controlled SQL Server, for example by opening a database project in Visual Studio, executing a connection string supplied through phishing, or following a link that triggers a data tool to connect. Once the client completes login negotiation, the malicious server returns crafted TDS responses that overflow the heap buffer and hijack execution.

No synthetic exploitation code is provided. Refer to the Microsoft CVE-2024-28932 Advisory for vendor-supplied technical context.

Detection Methods for CVE-2024-28932

Indicators of Compromise

• Outbound TDS connections (TCP/1433 or custom ports) from developer workstations or application servers to untrusted external SQL Server endpoints.
• Unexpected child processes spawned by sqlservr.exe, devenv.exe, ssms.exe, or processes linking msodbcsql17.dll or msodbcsql18.dll.
• Crash dumps or Windows Error Reporting events referencing heap corruption inside the Microsoft ODBC Driver modules.

Detection Strategies

• Inspect process telemetry for ODBC-consuming processes loading the Microsoft SQL Server driver and then performing anomalous activity such as shell creation, script execution, or LSASS access.
• Hunt for TDS sessions where clients connect to SQL Server endpoints outside approved internal subnets or cloud database services.
• Correlate driver version inventory against the patched builds listed in the Microsoft advisory to identify exposed hosts.

Monitoring Recommendations

• Enable EDR module-load and image-load telemetry for msodbcsql*.dll across endpoints and developer machines.
• Log and alert on new outbound SQL connections from workstations that do not normally communicate with database servers.
• Track Visual Studio and SQL tooling crash events and route them to a central SIEM for correlation with network egress data.

How to Mitigate CVE-2024-28932

Immediate Actions Required

• Apply the Microsoft security update for the ODBC Driver for SQL Server on all Windows, Linux, and macOS hosts as identified in the Microsoft CVE-2024-28932 Advisory.
• Update SQL Server 2019, SQL Server 2022, Visual Studio 2019, and Visual Studio 2022 installations that bundle the vulnerable driver.
• Inventory third-party applications that ship the Microsoft Driver for SQL Server and confirm they reference patched driver builds.

Patch Information

Microsoft released fixed versions of msodbcsql17 and msodbcsql18 alongside cumulative updates for SQL Server and Visual Studio on April 9, 2024. Refer to the Microsoft CVE-2024-28932 Advisory for the exact patched build numbers per platform.

Workarounds

• Restrict outbound TCP/1433 and other TDS ports from workstations and application servers to known, trusted SQL Server destinations only.
• Block connections to untrusted external SQL Server instances at the firewall or proxy layer until patches are deployed.
• Educate developers and database administrators to avoid opening connection strings, database projects, or .udl files received from untrusted sources.