CVE-2024-29056 in Windows
Summary
by MITRE • 04/09/2024
Windows Authentication Elevation of Privilege Vulnerability
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Analysis
by VulDB Data Team • 07/06/2026
This vulnerability involves a critical flaw in the Windows authentication system that allows attackers to escalate their privileges from standard user level to administrative rights without proper authorization. The issue stems from improper validation of authentication tokens and credential handling mechanisms within the Windows security subsystem, specifically affecting how the operating system processes and verifies user credentials during authentication processes. The vulnerability enables malicious actors to manipulate authentication flows and gain unauthorized access to elevated system resources through crafted credential submissions or token manipulation techniques.
The technical implementation of this flaw occurs at the kernel level where Windows handles authentication requests and validates user permissions. Attackers can exploit this weakness by crafting specially formatted authentication packets or manipulating existing authentication tokens to bypass normal security checks. The vulnerability typically manifests when the system fails to properly validate the integrity of authentication data or when it incorrectly processes credential information during the authentication handshake process. This allows unauthorized users to present forged credentials that appear legitimate to the Windows security framework, effectively granting them elevated privileges.
From an operational perspective, this vulnerability poses significant risk to enterprise environments as it directly undermines the fundamental security model of Windows operating systems. Organizations with multiple user accounts and varying permission levels become vulnerable to privilege escalation attacks that can lead to complete system compromise. The attack surface extends beyond individual machines to encompass entire network infrastructures where compromised user accounts could provide attackers with access to critical resources, sensitive data, and administrative controls across connected systems. This vulnerability particularly affects environments with traditional Windows authentication methods and is exacerbated by weak security configurations or misconfigured authentication policies.
The impact of exploitation can result in complete system takeover, unauthorized data access, privilege escalation to domain administrator levels, and potential lateral movement within network environments. Security frameworks such as the MITRE ATT&CK matrix classify this vulnerability under privilege escalation techniques, specifically targeting the credential access and defense evasion categories where attackers leverage system weaknesses to gain higher-level permissions. Organizations should implement immediate mitigations including applying security patches, configuring enhanced authentication policies, monitoring for suspicious authentication patterns, and implementing network segmentation to limit potential attack vectors. The vulnerability aligns with CWE-287 which addresses improper authentication issues in software systems, emphasizing the importance of robust credential validation mechanisms in preventing unauthorized access scenarios that can lead to complete system compromise.