CVE-2022-30146
📋 TL;DR
This vulnerability allows remote code execution on Windows systems running LDAP services. Attackers can exploit it by sending specially crafted requests to a vulnerable LDAP server, potentially gaining SYSTEM privileges. All Windows systems with LDAP enabled are affected.
💻 Affected Systems
- Windows Server
- Windows Client
📦 What is this software?
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 11 by Microsoft
Windows 11 by Microsoft
Windows 7 by Microsoft
Windows 7 by Microsoft
Windows 8.1 by Microsoft
Windows 8.1 by Microsoft
Windows Rt 8.1 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with SYSTEM privileges, enabling complete control over the server, data theft, and lateral movement across the network.
Likely Case
Remote code execution leading to malware deployment, credential harvesting, and establishment of persistent access in enterprise environments.
If Mitigated
Limited impact due to network segmentation, strict firewall rules, and LDAP hardening preventing exploitation attempts.
🎯 Exploit Status
Microsoft rates this as 'Exploitation More Likely' in their advisory. No public proof-of-concept has been released.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Security updates from June 2022 or later
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-30146
Restart Required: Yes
Instructions:
1. Apply the June 2022 Windows security updates. 2. For domain controllers, install updates during maintenance windows. 3. Restart affected systems to complete installation.
🔧 Temporary Workarounds
Block LDAP ports at perimeter
allPrevent external access to LDAP services by blocking TCP ports 389 and 636 at network perimeter.
Enable LDAP channel binding and signing
windowsConfigure LDAP signing and channel binding to prevent certain attack vectors.
Set-ADDCCloningExcludedApplicationList -RemoveList "*"
🧯 If You Can't Patch
- Implement strict network segmentation to isolate LDAP servers from untrusted networks
- Deploy intrusion detection systems to monitor for LDAP exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check if June 2022 security updates are installed via Windows Update history or systeminfo command.Check Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify KB5014692 (or later cumulative update) is installed and system has been restarted.📡 Detection & Monitoring
Log Indicators:
- Unusual LDAP query patterns in Windows Event Logs (Event ID 2889)
- Failed authentication attempts followed by successful exploitation
Network Indicators:
- Unusual LDAP traffic patterns, especially large or malformed LDAP packets
- Traffic to LDAP ports from unexpected sources
SIEM Query:
source="windows" event_id=2889 AND (ldap_query="*" OR ldap_response="*")