Patch
CVE-2024-43451
with vRx
Vulnerability Overview
CVE Name
CVE-2024-43451
Severity
6.5
Medium
CVE Description
NTLM Hash Disclosure Spoofing Vulnerability
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Script
Script Type
Remediation script
❗ CVE-2024-43451 is a vulnerability in systems that allow NTLM authentication, a legacy protocol that can be exploited for credential relay attacks or brute force attacks. This vulnerability arises when NTLM is enabled, leaving systems susceptible to unauthorized access, potentially disclosing the user's NTLMv2 hash to an attacker with only minimal interaction.
ℹ️ This mitigation script works as follows:
Registry Path Update: Modifies the registry value LmCompatibilityLevel located at HKLM:\SYSTEM\CurrentControlSet\Control\Lsa.
Set Compatibility Level: Changes LmCompatibilityLevel to 5, which enforces NTLMv2-only authentication and disables NTLMv1, effectively reducing the system’s vulnerability to credential relay attacks.
Status Confirmation: Outputs a message confirming that NTLM authentication has been disabled.
✅ By disabling NTLM and enforcing NTLMv2-only authentication, this script ensures that systems are protected against CVE-2024-43451. This mitigation strengthens the security posture by requiring more robust authentication mechanisms, significantly reducing the attack surface for credential spoofing and relay attacks.
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Affected OS & Apps
Windows Server 2025
by
Microsoft
Windows 11 24H2
by
Microsoft
Windows Server 2022 23H2
by
Microsoft
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