CVE-2024-21450
📋 TL;DR
This vulnerability in Microsoft's WDAC OLE DB provider for SQL Server allows remote attackers to execute arbitrary code by exploiting an integer overflow (CWE-190). It affects systems using this provider to connect to SQL Server databases. Attackers could gain control of affected systems without authentication.
💻 Affected Systems
- Microsoft WDAC OLE DB provider for SQL Server
📦 What is this software?
Windows 10 1507 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 administrative privileges, data exfiltration, lateral movement across network, and persistent backdoor installation.
Likely Case
Remote code execution leading to data theft, ransomware deployment, or system disruption.
If Mitigated
Limited impact with proper network segmentation, least privilege access, and updated systems.
🎯 Exploit Status
CVSS 8.8 indicates high severity with network attack vector and no authentication required. No public exploit code known at time of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft's February 2024 security updates or later
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21450
Restart Required: Yes
Instructions:
1. Apply Microsoft's February 2024 security updates. 2. Restart affected systems. 3. Verify patch installation via Windows Update history or system version.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to SQL Server instances and WDAC provider endpoints
Disable Unused Features
windowsDisable WDAC OLE DB provider if not required for operations
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure
- Monitor for unusual OLE DB provider activity and connection attempts
🔍 How to Verify
Check if Vulnerable:
Check if system has WDAC OLE DB provider installed and if February 2024 security updates are missingCheck Version:
wmic qfe list | findstr "KB" or Check Windows Update historyVerify Fix Applied:
Verify February 2024 security updates are installed via Windows Update or system patch status📡 Detection & Monitoring
Log Indicators:
- Unusual OLE DB provider connections
- Failed authentication attempts to SQL Server via WDAC
- Process creation from unexpected sources
Network Indicators:
- Unusual traffic to SQL Server ports from unexpected sources
- OLE DB protocol anomalies
SIEM Query:
Process creation where parent process involves ole* or sql* providers AND command line contains suspicious patterns