CVE-2003-0640 in WebLogic Server
Summary
by MITRE
BEA WebLogic Server and Express, when using NodeManager to start servers, provides Operator users with privileges to overwrite usernames and passwords, which may allow Operators to gain Admin privileges.
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Analysis
by VulDB Data Team • 08/12/2025
The vulnerability described in CVE-2003-0640 represents a critical privilege escalation flaw within BEA WebLogic Server and Express implementations that utilize NodeManager functionality. This security weakness specifically targets the authentication and authorization mechanisms that govern user roles within the WebLogic ecosystem. The flaw manifests when Operator-level users leverage the NodeManager component to initiate server processes, creating an unintended pathway for privilege elevation that directly undermines the security model of the application server.
The technical root cause of this vulnerability stems from insufficient access controls and privilege validation within the NodeManager implementation. When Operator users execute server startup operations through NodeManager, the system fails to properly validate whether these users possess the necessary administrative credentials or authorization levels required to modify critical authentication parameters. This design flaw allows malicious or compromised Operator accounts to manipulate username and password configurations, effectively enabling them to assume administrative privileges without proper authorization. The vulnerability operates at the intersection of inadequate input validation and weak privilege separation mechanisms, creating a scenario where role-based access controls can be bypassed through legitimate administrative tool usage.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass significant security implications for organizations relying on WebLogic Server infrastructure. Attackers who successfully exploit this vulnerability can gain complete administrative control over WebLogic domains, potentially leading to unauthorized access to sensitive applications, data breaches, and system compromise. The attack vector is particularly concerning because it leverages legitimate administrative tools and processes, making detection more challenging and allowing attackers to operate within normal system behavior patterns. This vulnerability essentially undermines the fundamental security principle of least privilege by providing unauthorized access to administrative capabilities through legitimate operational channels.
Organizations utilizing affected WebLogic Server versions should implement immediate mitigations including disabling NodeManager functionality when not required, implementing strict access controls for Operator accounts, and ensuring proper privilege separation between different user roles. The vulnerability aligns with CWE-284 (Improper Access Control) and represents a classic example of privilege escalation through improper authorization checks. From an ATT&CK framework perspective, this vulnerability maps to privilege escalation techniques and can be exploited as part of broader attack chains targeting enterprise application servers. The flaw demonstrates the critical importance of proper authentication validation and access control implementation, particularly within administrative toolsets that handle sensitive system parameters and user credentials. Organizations should also consider implementing monitoring and alerting mechanisms to detect unauthorized modifications to authentication configurations that could indicate exploitation attempts.