CVE-2004-0118 in Windows
Summary
by MITRE
The component for the Virtual DOS Machine (VDM) subsystem in Windows NT 4.0 and Windows 2000 does not properly validate system structures, which allows local users to access protected kernel memory and execute arbitrary code.
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Analysis
by VulDB Data Team • 01/02/2025
The vulnerability described in CVE-2004-0118 resides within the Virtual DOS Machine subsystem of Windows NT 4.0 and Windows 2000 operating systems, representing a critical flaw in the kernel-level memory management mechanisms. This vulnerability specifically targets the VDM component that enables legacy DOS applications to run within the Windows environment, creating a potential attack surface where improper validation of system structures could be exploited. The flaw stems from insufficient input validation and memory boundary checking within the subsystem's kernel routines, allowing malicious code to bypass normal security restrictions.
The technical implementation of this vulnerability involves the exploitation of inadequate validation procedures within the Windows VDM subsystem that handles memory allocation and access control. When the system processes DOS application requests through the VDM layer, it fails to properly verify the integrity of system structures before granting access to kernel memory regions. This weakness enables local attackers who possess user-level privileges to manipulate system memory pointers and access protected kernel addresses. The vulnerability operates at the kernel level, making it particularly dangerous as it can be leveraged to execute arbitrary code with system-level privileges, effectively allowing attackers to bypass standard user access controls and gain unauthorized administrative access to the affected systems.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it represents a fundamental flaw in the Windows kernel's memory protection mechanisms that could enable complete system compromise. Attackers exploiting this vulnerability can potentially access sensitive kernel memory areas, read protected system information, modify critical system structures, and ultimately take complete control of the affected Windows systems. The vulnerability affects both Windows NT 4.0 and Windows 2000 platforms, which were widely deployed enterprise operating systems during the early 2000s, making the potential impact substantial across corporate environments. This flaw directly relates to CWE-125, which describes out-of-bounds read vulnerabilities, and can be categorized under the ATT&CK technique T1068, which covers local privilege escalation through kernel exploits.
Mitigation strategies for this vulnerability primarily involve applying the official Microsoft security patches that address the memory validation issues within the VDM subsystem. System administrators should prioritize immediate patch deployment across all affected Windows NT 4.0 and Windows 2000 systems to prevent exploitation. Additionally, implementing network segmentation and access controls can help limit the potential attack surface, while disabling unnecessary VDM functionality can reduce the risk exposure. Monitoring for suspicious system behavior and unauthorized memory access attempts should be implemented to detect potential exploitation attempts. The vulnerability underscores the importance of maintaining up-to-date security patches and proper system hardening practices, particularly for legacy operating systems that may be vulnerable to kernel-level exploits. Organizations should also consider migrating away from unsupported platforms to reduce exposure to such critical vulnerabilities that may not receive further security updates.