CVE-2023-24948
📋 TL;DR
This vulnerability allows an attacker with local access to exploit a heap-based buffer overflow in Windows Bluetooth drivers to execute arbitrary code with SYSTEM privileges. It affects Windows systems with Bluetooth functionality enabled. Attackers need local access to the target system to exploit this vulnerability.
💻 Affected Systems
- Windows 10
- Windows 11
- Windows Server 2022
📦 What is this software?
Windows 10 1507 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 20h2 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 21h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with SYSTEM privileges, allowing installation of malware, data theft, and persistence mechanisms.
Likely Case
Local privilege escalation from a lower-privileged user account to SYSTEM, enabling lateral movement and persistence.
If Mitigated
Limited impact if proper access controls prevent local attacker access and Bluetooth is disabled on critical systems.
🎯 Exploit Status
Requires local access and knowledge of heap manipulation techniques. No public exploits known as of knowledge cutoff.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: May 2023 security updates (KB5026361 for Windows 10, KB5026372 for Windows 11)
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24948
Restart Required: Yes
Instructions:
1. Open Windows Update settings. 2. Click 'Check for updates'. 3. Install May 2023 security updates. 4. Restart system when prompted.
🔧 Temporary Workarounds
Disable Bluetooth
windowsDisable Bluetooth functionality to prevent exploitation
PowerShell: Disable-WindowsOptionalFeature -Online -FeatureName "Microsoft-Windows-Bluetooth-Package"
GUI: Settings > Bluetooth & devices > Bluetooth > Turn off
🧯 If You Can't Patch
- Disable Bluetooth on all affected systems via Group Policy or local settings
- Implement strict access controls to prevent unauthorized local access to systems
🔍 How to Verify
Check if Vulnerable:
Check if May 2023 security updates are installed: PowerShell: Get-HotFix -Id KB5026361, KB5026372Check Version:
PowerShell: systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify May 2023 updates are installed and system has been restarted📡 Detection & Monitoring
Log Indicators:
- Event ID 1000 application crashes in Bluetooth-related processes
- Unexpected privilege escalation events in security logs
Network Indicators:
- Unusual Bluetooth connection attempts from unexpected sources
SIEM Query:
EventID=1000 AND (ProcessName="bthport.sys" OR ProcessName="BthEnum.sys")