CVE-2025-54108
📋 TL;DR
A race condition vulnerability in the Capability Access Management Service (camsvc) allows an authorized attacker to execute concurrent operations with improper synchronization, potentially leading to local privilege escalation. This affects systems running vulnerable versions of the service where an attacker already has some level of access.
💻 Affected Systems
- Microsoft Windows Capability Access Management Service
📦 What is this software?
Windows 11 24h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
An authenticated attacker could gain SYSTEM/root privileges on the affected system, enabling complete compromise of the host.
Likely Case
An authenticated attacker with standard user privileges could elevate to administrative privileges, allowing installation of malware, data theft, or lateral movement.
If Mitigated
With proper access controls and monitoring, exploitation would be limited to authorized users and could be detected through abnormal privilege escalation attempts.
🎯 Exploit Status
Exploitation requires race condition timing and understanding of the camsvc service internals. Requires authenticated access to the target system.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific patch versions
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54108
Restart Required: Yes
Instructions:
1. Apply the latest Windows security updates from Microsoft. 2. Restart the system to complete the patch installation. 3. Verify the camsvc service is running the updated version.
🔧 Temporary Workarounds
Restrict camsvc service permissions
windowsLimit which users can interact with the Capability Access Management Service
sc.exe sdset camsvc D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)
🧯 If You Can't Patch
- Implement strict access controls to limit which users can log into affected systems
- Monitor for privilege escalation attempts and unusual camsvc service activity
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for applied patches addressing CVE-2025-54108 or verify camsvc service versionCheck Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify the latest Windows security updates are installed and the system has been restarted📡 Detection & Monitoring
Log Indicators:
- Unusual camsvc service activity
- Multiple rapid privilege escalation attempts
- Failed then successful privilege elevation
Network Indicators:
- Local system calls to camsvc with timing patterns indicative of race conditions
SIEM Query:
EventID=4688 AND NewProcessName="*camsvc*" AND SubjectUserName NOT IN ("SYSTEM", "LOCAL SERVICE", "NETWORK SERVICE")