CVE-2000-0298 in Windows
Summary
by MITRE
The unattended installation of Windows 2000 with the OEMPreinstall option sets insecure permissions for the All Users and Default Users directories.
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Analysis
by VulDB Data Team • 04/21/2026
The vulnerability described in CVE-2000-0298 represents a critical security flaw in the Windows 2000 operating system's unattended installation process. This issue specifically affects systems configured with the OEMPreinstall option, which is commonly used in enterprise environments to automate the deployment of multiple machines. The flaw stems from the improper configuration of directory permissions during the installation phase, creating persistent security weaknesses that can be exploited by malicious actors. When Windows 2000 is installed using unattended methods with this particular configuration, the system fails to establish appropriate access controls for critical user directories, leaving them vulnerable to unauthorized modifications and access.
The technical implementation of this vulnerability involves the creation of All Users and Default Users directories with overly permissive access controls. These directories are typically used to store shared application data, user profiles, and system configuration files that are accessible to multiple users within the system. The insecure permissions allow local users or attackers with minimal privileges to modify or delete critical system files, potentially leading to privilege escalation or system compromise. This flaw is particularly concerning because it occurs during the installation phase, meaning that the vulnerability exists from the moment the system becomes operational, creating a persistent threat vector that can be exploited before any additional security measures are implemented.
From an operational impact perspective, this vulnerability creates significant risks for organizations deploying Windows 2000 systems through automated processes. The insecure directory permissions provide attackers with potential entry points to gain elevated privileges within the system, as modifications to these directories can be used to inject malicious code or alter system behavior. The vulnerability directly relates to CWE-276, which addresses improper permissions for critical system resources, and aligns with ATT&CK technique T1068, which covers privilege escalation through local system modifications. Organizations using unattended installation methods are particularly at risk since the vulnerability is present in the base system configuration, making it difficult to detect and remediate without complete system reinstallation.
The mitigation strategies for this vulnerability primarily involve manual intervention to correct the directory permissions after installation or implementing alternative installation methods that do not utilize the vulnerable OEMPreinstall option. System administrators should ensure that all user directories are properly configured with appropriate access controls, typically requiring the removal of unnecessary write permissions for standard users and implementing proper discretionary access control lists. Organizations should also consider implementing additional security measures such as mandatory access controls, regular permission audits, and monitoring for unauthorized directory modifications. The vulnerability demonstrates the importance of proper access control configuration during system deployment phases and highlights the need for comprehensive security reviews of automated installation processes to prevent similar issues in modern deployment scenarios.