CVE-2024-21347
📋 TL;DR
This vulnerability in Microsoft ODBC Driver allows remote attackers to execute arbitrary code on affected systems by sending specially crafted requests. It affects applications using vulnerable ODBC drivers for database connectivity. Systems with ODBC drivers exposed to untrusted input are at risk.
💻 Affected Systems
- Microsoft ODBC Driver
📦 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 attacker gaining complete control over the affected system, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Application compromise leading to data exfiltration, privilege escalation, or service disruption for applications using vulnerable ODBC connections.
If Mitigated
Limited impact with proper network segmentation and access controls preventing exploitation attempts from reaching vulnerable systems.
🎯 Exploit Status
Microsoft rates this as 'Exploitation More Likely' in their advisory. The vulnerability requires the attacker to send specially crafted requests to a vulnerable ODBC endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Update Catalog for specific driver updates
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21347
Restart Required: Yes
Instructions:
1. Apply latest security updates from Microsoft
2. Update ODBC drivers to patched versions
3. Restart affected systems and applications
4. Verify patch installation
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to ODBC endpoints to only trusted sources
Use firewall rules to limit ODBC port access (typically TCP 1433 for SQL Server)
Input Validation
allImplement strict input validation for all ODBC connection parameters
Application-level validation of ODBC connection strings and parameters
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure of ODBC endpoints
- Monitor for unusual ODBC connection attempts and failed authentication events
🔍 How to Verify
Check if Vulnerable:
Check ODBC driver version against Microsoft's advisory. Use ODBC Data Source Administrator to view installed driver versions.Check Version:
odbcad32.exe (Windows ODBC Data Source Administrator) or check registry at HKEY_LOCAL_MACHINE\SOFTWARE\ODBC\ODBCINST.INIVerify Fix Applied:
Verify ODBC driver version has been updated to patched version. Check Windows Update history for security updates applied.📡 Detection & Monitoring
Log Indicators:
- Unusual ODBC connection attempts
- Failed ODBC authentication events
- Application crashes related to ODBC drivers
Network Indicators:
- Unusual traffic to ODBC ports from unexpected sources
- Malformed ODBC protocol packets
SIEM Query:
source="*odbc*" OR event_id=4625 (failed logon) AND process_name="*odbc*"