CVE-2006-0008 in Office
Summary
by MITRE
The ShellAbout API call in Korean Input Method Editor (IME) in Korean versions of Microsoft Windows XP SP1 and SP2, Windows Server 2003 up to SP1, and Office 2003, allows local users to gain privileges by launching the "shell about dialog box" and clicking the "End-User License Agreement" link, which executes Notepad with the privileges of the program that displays the about box.
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Analysis
by VulDB Data Team • 06/25/2025
The vulnerability described in CVE-2006-0008 represents a critical privilege escalation flaw within the Korean Input Method Editor component of Microsoft Windows operating systems. This issue specifically affects Korean versions of Windows XP Service Pack 1 and 2, Windows Server 2003 up to Service Pack 1, and Microsoft Office 2003 installations. The vulnerability stems from improper privilege handling within the ShellAbout API implementation, which is responsible for displaying about dialog boxes for various applications. When a local user interacts with the shell about dialog box through the Korean IME, the system executes Notepad with elevated privileges, creating a significant security risk that can be exploited by malicious actors.
The technical flaw manifests in the improper privilege separation mechanism within the ShellAbout API call. When applications display about dialog boxes through this API, particularly in Korean Windows versions, the system fails to properly sanitize the execution context of secondary applications launched through the dialog interface. The specific trigger occurs when users click the "End-User License Agreement" link within the shell about dialog, which causes Notepad to execute with the same privileges as the parent application that initiated the dialog. This behavior violates fundamental security principles of privilege separation and least privilege enforcement, allowing local users to potentially execute arbitrary code with elevated permissions.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it creates a persistent attack vector that can be leveraged by local adversaries to gain unauthorized system access. Attackers can exploit this flaw to execute malicious code through Notepad with elevated privileges, potentially leading to complete system compromise. The vulnerability is particularly concerning because it requires no special privileges to exploit initially, making it accessible to any local user with basic system access. This characteristic aligns with ATT&CK technique T1068, which covers local privilege escalation through application misconfigurations, and represents a classic case of privilege escalation through improper API usage. The vulnerability affects a significant portion of Microsoft Windows installations from the early 2000s, making it a widespread concern for organizations with legacy systems.
Mitigation strategies for this vulnerability primarily involve applying Microsoft security patches and updates that address the privilege escalation flaw in the ShellAbout API implementation. Organizations should prioritize immediate deployment of the relevant security updates from Microsoft, as this vulnerability was officially addressed through Windows security bulletins. Additionally, system administrators should consider implementing additional security measures such as restricting local user access to potentially vulnerable applications and monitoring for unauthorized execution of Notepad with elevated privileges. The vulnerability also highlights the importance of proper API usage and privilege handling in application development, as outlined in CWE-276, which covers improper privileges. Organizations should conduct thorough security assessments of their legacy systems to identify similar privilege escalation vulnerabilities and ensure that all applications properly implement privilege separation mechanisms to prevent unauthorized privilege elevation.