CVE-2024-26214
📋 TL;DR
This vulnerability in Microsoft WDAC SQL Server ODBC Driver allows remote attackers to execute arbitrary code on affected systems by sending specially crafted requests. It affects systems using the vulnerable ODBC driver to connect to SQL Server databases. Organizations with SQL Server deployments using this driver are at risk.
💻 Affected Systems
- Microsoft WDAC SQL Server ODBC Driver
📦 What is this software?
Windows 10 1507 by Microsoft
Windows 10 1507 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 21h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 23h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining SYSTEM/administrator privileges, data exfiltration, ransomware deployment, and lateral movement across the network.
Likely Case
Database compromise leading to data theft, credential harvesting, and installation of backdoors for persistent access.
If Mitigated
Limited impact due to network segmentation, least privilege access, and proper monitoring detecting exploitation attempts.
🎯 Exploit Status
Based on CVSS score of 8.8 and CWE-122 (Heap-based Buffer Overflow), exploitation likely requires sending malicious data but no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific version
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-26214
Restart Required: Yes
Instructions:
1. Apply the latest Microsoft security updates via Windows Update. 2. For manual updates, download the patch from Microsoft Update Catalog. 3. Restart affected systems after patching.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to SQL Server instances using the ODBC driver to only trusted hosts.
Disable Unused ODBC Connections
windowsRemove or disable ODBC data sources that are not essential for operations.
odbcad32.exe (Windows ODBC Data Source Administrator) to manage connections
🧯 If You Can't Patch
- Implement strict network access controls to limit which systems can communicate with SQL Server instances using the ODBC driver.
- Deploy application allowlisting to prevent execution of unauthorized code, and monitor for anomalous ODBC connection attempts.
🔍 How to Verify
Check if Vulnerable:
Check the version of the Microsoft WDAC SQL Server ODBC Driver in ODBC Data Source Administrator (odbcad32.exe) and compare with patched versions in Microsoft advisory.Check Version:
On Windows, use odbcad32.exe or check registry at HKEY_LOCAL_MACHINE\SOFTWARE\ODBC\ODBCINST.INI\ODBC Drivers for driver details.Verify Fix Applied:
Verify that the driver version has been updated to the patched version listed in the Microsoft security update.📡 Detection & Monitoring
Log Indicators:
- Unusual ODBC connection attempts, especially from unexpected IP addresses or with malformed queries in SQL Server logs.
Network Indicators:
- Anomalous network traffic to SQL Server ports (default 1433) with patterns indicative of buffer overflow exploitation.
SIEM Query:
Example: 'source="sql_server_logs" AND (event_id=18456 OR event_id=18454) AND message CONTAINS "ODBC" AND message CONTAINS "exception"'