CVE-2025-24059
📋 TL;DR
This vulnerability in Windows Common Log File System Driver involves incorrect numeric type conversion that allows authenticated attackers to escalate privileges locally. It affects Windows systems with the vulnerable driver component. Attackers must already have some level of access to exploit this vulnerability.
💻 Affected Systems
- Windows Common Log File System Driver
📦 What is this software?
Windows 10 1507 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 24h2 by Microsoft
Windows 11 24h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
An authenticated attacker gains SYSTEM-level privileges, enabling complete system compromise, data theft, persistence establishment, and lateral movement across the network.
Likely Case
An attacker with standard user privileges elevates to administrative rights, allowing installation of malware, configuration changes, and access to sensitive data.
If Mitigated
With proper access controls and monitoring, exploitation attempts are detected and blocked before privilege escalation occurs.
🎯 Exploit Status
Requires authenticated access and knowledge of driver internals. Exploitation involves triggering specific numeric conversion conditions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific KB numbers
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24059
Restart Required: No
Instructions:
1. Apply the latest Windows security updates from Microsoft. 2. For enterprise environments, deploy updates through WSUS or Microsoft Endpoint Configuration Manager. 3. Verify update installation via Windows Update history.
🔧 Temporary Workarounds
Restrict driver loading
allConfigure Windows to restrict loading of the Common Log File System Driver if not required
🧯 If You Can't Patch
- Implement strict access controls and least privilege principles to limit authenticated user capabilities
- Enable enhanced monitoring and logging for privilege escalation attempts and driver activities
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for missing security updates or use Microsoft's Security Update Guide with your Windows versionCheck Version:
wmic os get caption, version, buildnumberVerify Fix Applied:
Verify the security update is installed via Windows Update history or by checking system version against patched versions in Microsoft advisory📡 Detection & Monitoring
Log Indicators:
- Unexpected driver loading events
- Privilege escalation attempts in security logs
- Process creation with elevated privileges from standard users
Network Indicators:
- None - this is a local exploitation vulnerability
SIEM Query:
EventID=4688 AND NewProcessName contains * AND SubjectUserName != * AND TokenElevationType != %%1936