CVE-2024-30076
📋 TL;DR
This vulnerability allows an authenticated attacker to escalate privileges within Windows Container Manager Service. Attackers could gain SYSTEM-level access on affected Windows systems. Only systems running Windows with Container Manager Service enabled are affected.
💻 Affected Systems
- Windows Container Manager Service
📦 What is this software?
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 SYSTEM privileges, enabling complete control over the host, installation of malware, data theft, and lateral movement.
Likely Case
Privilege escalation from a lower-privileged user account to SYSTEM, allowing attackers to bypass security controls and execute arbitrary code.
If Mitigated
Limited impact if proper access controls, least privilege principles, and network segmentation are implemented to restrict container service access.
🎯 Exploit Status
Exploitation requires local access and authentication; no public exploit code is known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply the latest Windows security updates from Microsoft (specific KB numbers in the advisory)
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-30076
Restart Required: Yes
Instructions:
1. Open Windows Update settings
2. Check for updates and install all available security updates
3. Restart the system as prompted
🔧 Temporary Workarounds
Disable Windows Container Manager Service
windowsStop and disable the Container Manager Service if not required, reducing the attack surface.
sc stop cmsvc
sc config cmsvc start= disabled
🧯 If You Can't Patch
- Restrict access to systems running Container Manager Service using network segmentation and firewall rules.
- Implement strict least privilege principles to limit user accounts that can interact with container services.
🔍 How to Verify
Check if Vulnerable:
Check if the system is running a vulnerable version of Windows and has Container Manager Service enabled via 'sc query cmsvc'.Check Version:
winverVerify Fix Applied:
Verify that Windows Update history shows the relevant security update installed and that the system version matches the patched version.📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation events in Windows Security logs (Event ID 4672, 4688)
- Suspicious service manipulation attempts in System logs
Network Indicators:
- Unexpected network connections from container-related processes
SIEM Query:
EventID=4672 OR EventID=4688 | where ProcessName contains 'cmsvc' OR CommandLine contains container-related terms