CVE-2004-0894 in Windows
Summary
by MITRE
lsass (local security authority subsystem service) of windows 2000 server and windows server 2003 does not properly validate connection information which allows local users to gain privileges via a specially-designed program.
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Analysis
by VulDB Data Team • 08/19/2025
The vulnerability described in CVE-2004-0894 targets the local security authority subsystem service known as lsass.exe which serves as a critical component in microsoft windows operating systems including windows 2000 server and windows server 2003. This service is responsible for enforcing local security policies and managing authentication processes within the windows environment. The flaw exists in how lsass validates incoming connection information, creating a potential privilege escalation vector that could be exploited by local users who have access to the system.
The technical nature of this vulnerability stems from inadequate input validation within the lsass service implementation. When local users submit specially crafted connection information to the service, the validation mechanisms fail to properly sanitize or verify the data being processed. This validation failure creates a condition where malicious input can bypass normal security checks and potentially elevate privileges from standard user level to administrative or system level access. The vulnerability specifically relates to the service's handling of connection parameters without sufficient cryptographic or security protocol validation.
From an operational perspective, this vulnerability represents a significant security risk because it allows local attackers to escalate their privileges without requiring network access or external exploitation vectors. The attack surface is broad as any user with local login access to the affected systems could potentially exploit this flaw. This makes the vulnerability particularly dangerous in multi-user environments where local access is not strictly controlled or monitored. The privilege escalation could enable attackers to gain complete control over the affected systems, access sensitive data, modify system configurations, or establish persistent access through elevated privileges.
The vulnerability aligns with common weakness enumerations such as cwe-20, which describes improper input validation, and cwe-264, which covers permissions, privileges, and access controls. From an attack framework perspective, this vulnerability would typically be categorized under the privilege escalation category in the attack tactics and techniques framework, potentially falling under techniques that involve gaining elevated privileges through system service manipulation. Organizations should implement immediate mitigations including applying microsoft security patches, implementing strict access controls, monitoring for unusual authentication patterns, and ensuring that only authorized users have local access to critical systems. The vulnerability also highlights the importance of proper service design principles and the necessity of robust input validation mechanisms in security-critical system components.