CVE-2023-23410
📋 TL;DR
This vulnerability in Windows HTTP.sys allows an attacker to gain elevated privileges on affected systems by exploiting an integer overflow condition. It affects Windows servers and workstations running vulnerable versions of the HTTP.sys driver. Successful exploitation could lead to system compromise.
💻 Affected Systems
- Windows Server
- Windows Client
📦 What is this software?
Windows 10 1507 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 20h2 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 21h2 by Microsoft
Windows 11 22h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with SYSTEM privileges, enabling installation of malware, data theft, and lateral movement across the network.
Likely Case
Local privilege escalation allowing attackers to execute arbitrary code with elevated privileges on compromised systems.
If Mitigated
Limited impact due to network segmentation, least privilege principles, and proper patch management preventing successful exploitation.
🎯 Exploit Status
Exploitation requires local access to execute code initially. The vulnerability involves integer overflow (CWE-190) in HTTP.sys driver.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: March 2023 security updates (KB5023696, KB5023697, etc.)
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23410
Restart Required: Yes
Instructions:
1. Apply March 2023 Windows security updates from Windows Update. 2. For enterprise environments, deploy updates via WSUS, SCCM, or Intune. 3. Restart systems after patch installation.
🔧 Temporary Workarounds
Disable HTTP.sys if not needed
windowsRemove or disable HTTP.sys driver if web services are not required
sc config http start= disabled
sc stop http
Network segmentation
allIsolate vulnerable systems from critical assets and limit lateral movement
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable systems
- Apply principle of least privilege and monitor for privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Windows version and compare with affected versions list. Systems without March 2023 security updates are vulnerable.Check Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify March 2023 security updates are installed via 'winver' or 'systeminfo' command📡 Detection & Monitoring
Log Indicators:
- Event ID 4624 (logon) with elevated privileges from unusual processes
- Security log entries showing privilege escalation
Network Indicators:
- Unusual outbound connections from systems after local compromise
SIEM Query:
EventID=4624 AND (NewElevatedToken="%%1842" OR TokenElevationType="%%1938") | stats count by Computer, ProcessName