CVE-2024-21414 – This vulnerability in SQL Server Native Client ... (How to Fix)

Q: What is the severity of CVE-2024-21414?

CVE-2024-21414 has a CVSS score of 8.8 (HIGH). This vulnerability in SQL Server Native Client OLE DB Provider allows remote attackers to execute arbitrary code on affected systems by sending specially crafted requests. It affects systems using this provider for database connectivity, primarily impacting SQL Server deployments and applications relying on this component. The vulnerability requires the attacker to have network access to the vulnerable service.

📋 TL;DR

This vulnerability in SQL Server Native Client OLE DB Provider allows remote attackers to execute arbitrary code on affected systems by sending specially crafted requests. It affects systems using this provider for database connectivity, primarily impacting SQL Server deployments and applications relying on this component. The vulnerability requires the attacker to have network access to the vulnerable service.

💻 Affected Systems

Products:

Microsoft SQL Server Native Client OLE DB Provider

Versions: Specific versions as listed in Microsoft advisory (typically recent versions before patching)

Operating Systems: Windows Server, Windows Client OS supporting SQL Server

Default Config Vulnerable: ⚠️ Yes

Notes: Affects systems where the OLE DB provider is installed and used for database connections. SQL Server itself may not need to be vulnerable if only the provider component is exploited.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete system compromise with administrative privileges, data exfiltration, lateral movement within the network, and persistent backdoor installation.

🟠

Likely Case

Remote code execution with the privileges of the SQL Server service account, potentially leading to database compromise, credential theft, and further network exploitation.

🟢

If Mitigated

Limited impact due to network segmentation, minimal service privileges, and proper access controls preventing successful exploitation.

🌐 Internet-Facing: HIGH if the SQL Server or applications using the vulnerable provider are exposed to the internet without proper firewalling.

🏢 Internal Only: HIGH due to the potential for lateral movement and privilege escalation within enterprise networks.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: MEDIUM

Exploitation requires network access to a service using the vulnerable provider. No authentication is needed based on CVSS metrics and description.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Check Microsoft Security Update Guide for specific patched versions

Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21414

Restart Required: Yes

Instructions:

1. Apply the latest SQL Server cumulative update or security update from Microsoft
2. Restart affected services or systems as required
3. Verify the patch is applied correctly

🔧 Temporary Workarounds

Network Segmentation

windows

Restrict network access to SQL Server and applications using the OLE DB provider

Configure firewall rules to allow only trusted IPs to access SQL Server ports (default 1433)

Service Account Hardening

windows

Run SQL Server services with minimal necessary privileges

Configure SQL Server service to run under a dedicated low-privilege account

🧯 If You Can't Patch

Implement strict network access controls to isolate vulnerable systems
Monitor for exploitation attempts using network and host-based detection

🔍 How to Verify

Check if Vulnerable:

Check installed SQL Server Native Client version against patched versions in Microsoft advisory

Check Version:

SELECT @@VERSION; in SQL Server Management Studio or check installed programs in Control Panel

Verify Fix Applied:

Verify SQL Server cumulative update or security update is installed and version matches patched release

📡 Detection & Monitoring

Log Indicators:

Unusual SQL Server error logs related to OLE DB provider
Failed authentication attempts followed by exploitation patterns
Windows Event Logs showing new process creation from SQL Server service

Network Indicators:

Unusual network traffic to SQL Server ports from unexpected sources
SQL protocol anomalies or malformed packets

SIEM Query:

Example: SourceIP NOT IN (trusted_ips) AND DestinationPort=1433 AND (ProtocolAnomaly OR NewProcessFromSQLService)

📊 Metadata

CVE ID: CVE-2024-21414

CVSS v3 Score: 8.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE: CWE-122

Published: July 9, 2024

Last Updated: January 15, 2025

🔗 References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21414 Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21414 Vendor Advisory

📤 Share & Export

📄 Export Markdown 📋 Export JSON

🔗 Related Vulnerabilities

If you're affected by CVE-2024-21414, you might also want to check these: