CVE-2024-49112
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Windows systems running LDAP services by exploiting an integer overflow condition. It affects Windows servers and workstations with LDAP enabled, particularly domain controllers and systems using Active Directory. Attackers can potentially gain full system control without authentication.
💻 Affected Systems
- Windows Server
- Windows Client
📦 What is this software?
Windows 10 1507 by Microsoft
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 24h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of domain controllers leading to domain takeover, credential theft, lateral movement across entire network, and persistent backdoor installation.
Likely Case
Compromise of individual servers/workstations with LDAP enabled, leading to data exfiltration, ransomware deployment, or credential harvesting.
If Mitigated
Limited impact due to network segmentation, proper patch management, and restricted LDAP access, potentially resulting in isolated system compromise.
🎯 Exploit Status
CVSS 9.8 indicates critical severity with network-based, unauthenticated exploitation possible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: To be determined from Microsoft's monthly security updates
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49112
Restart Required: Yes
Instructions:
1. Apply latest Windows security updates from Microsoft. 2. Restart affected systems. 3. Verify patch installation via Windows Update history.
🔧 Temporary Workarounds
Restrict LDAP Access
allBlock unnecessary LDAP traffic at network perimeter and internal firewalls
Disable LDAP if Not Required
windowsTurn off LDAP services on systems where they are not essential
sc config NTDS start= disabled
net stop NTDS
🧯 If You Can't Patch
- Implement strict network segmentation to isolate LDAP servers
- Deploy intrusion prevention systems with rules to detect LDAP exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check Windows version and compare with Microsoft's affected versions listCheck Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify Windows Update history contains the relevant security patch KB number📡 Detection & Monitoring
Log Indicators:
- Unusual LDAP connection attempts
- Process creation from LDAP service
- Memory allocation failures in LDAP logs
Network Indicators:
- Anomalous LDAP traffic patterns
- Unexpected LDAP bind requests
- Large LDAP queries
SIEM Query:
source="windows" AND (event_id=4625 OR event_id=4688) AND process_name="lsass.exe" AND destination_port=389