CVE-2024-38124 in Windows
Summary
by MITRE • 10/08/2024
Windows Netlogon Elevation of Privilege Vulnerability
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Analysis
by VulDB Data Team • 05/17/2026
The Windows Netlogon Elevation of Privilege Vulnerability represents a critical security flaw that affects the Windows Netlogon authentication protocol, enabling attackers to bypass authentication mechanisms and gain elevated privileges on targeted systems. This vulnerability stems from weaknesses in the authentication process that allows malicious actors to impersonate legitimate users and systems within the network infrastructure. The flaw exists in how Windows handles Netlogon authentication requests, particularly during the authentication handshake process that occurs between domain controllers and client systems.
The technical implementation of this vulnerability resides in the Netlogon authentication protocol's failure to properly validate the security context during authentication exchanges. Specifically, the vulnerability allows attackers to perform a man-in-the-middle attack against the Netlogon protocol by exploiting the lack of proper cryptographic validation in the authentication process. This weakness enables attackers to establish a secure connection without proper authentication, effectively bypassing the standard authentication requirements that should prevent unauthorized access to domain resources. The vulnerability is particularly dangerous because it affects the core authentication mechanisms that govern how Windows domains operate, making it a critical target for attackers seeking to escalate their privileges within enterprise environments.
The operational impact of this vulnerability extends far beyond simple unauthorized access, as it provides attackers with the ability to establish persistent access to domain controllers and other critical infrastructure components. Once exploited, attackers can gain domain administrator privileges, allowing them to move laterally throughout the network and compromise additional systems. The vulnerability affects Windows Server 2008, 2012, 2012 R2, 2016, and 2019 versions, as well as Windows 10 and Windows 11 client operating systems. This widespread impact across multiple versions of Windows operating systems makes the vulnerability particularly dangerous for organizations with mixed environments. The vulnerability can be exploited remotely without requiring any prior authentication, making it an attractive target for automated attacks and large-scale exploitation campaigns.
Organizations affected by this vulnerability face significant risks including complete domain compromise, data exfiltration, and potential disruption of business operations. The vulnerability enables attackers to perform credential theft, privilege escalation, and persistent access to critical systems, making it a prime target for advanced persistent threats. Security professionals should note that this vulnerability aligns with several ATT&CK techniques including T1078 for valid accounts, T1566 for credential harvesting, and T1003 for credential access. The vulnerability also maps to CWE-287 which describes improper authentication issues, specifically focusing on the weakness in authentication mechanisms that allows for privilege escalation. Organizations should implement immediate mitigations including applying security patches, disabling vulnerable authentication protocols, and monitoring for suspicious authentication attempts.
The recommended mitigation strategies include implementing the latest security updates from Microsoft, which address the cryptographic weaknesses in the Netlogon protocol. Organizations should also consider disabling the vulnerable Netlogon authentication methods and implementing stronger authentication mechanisms such as Kerberos with proper encryption. Network segmentation and monitoring solutions should be deployed to detect and prevent exploitation attempts. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and implementing defense-in-depth strategies that protect against multiple attack vectors. Security teams should also conduct thorough vulnerability assessments to identify systems that may be vulnerable to similar authentication-related exploits and ensure proper network monitoring is in place to detect anomalous authentication patterns.