CVE-2004-2289 in Windows
Summary
by MITRE
Microsoft Windows XP Explorer allows local users to execute arbitrary code via a system folder with a Desktop.ini file containing a .ShellClassInfo specifier with a CLSID value that is associated with an executable file.
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Analysis
by VulDB Data Team • 09/25/2025
This vulnerability exists in Microsoft Windows XP Explorer and represents a classic case of insecure file handling that enables privilege escalation through malicious file specification. The flaw occurs when the Windows Explorer processes system folders containing Desktop.ini files with specific .ShellClassInfo sections that reference CLSID values pointing to executable files. The vulnerability stems from the operating system's failure to properly validate or sanitize these CLSID references during file system navigation operations.
The technical implementation of this vulnerability leverages the Windows shell's automatic processing of Desktop.ini configuration files within system folders. When Explorer encounters a folder with a Desktop.ini file containing a .ShellClassInfo section, it attempts to resolve the CLSID value to determine how to display the folder in the user interface. This resolution process does not adequately verify that the referenced executable is safe or intended for execution, creating an opportunity for malicious actors to place specially crafted Desktop.ini files in system directories.
The operational impact of this vulnerability is significant as it allows local users to execute arbitrary code with the privileges of the user running the Windows Explorer process. This represents a privilege escalation vector that can be exploited by attackers who gain access to a user account on the system. The vulnerability is particularly dangerous because it operates within the trusted Windows shell environment, making it difficult to detect and prevent through standard security measures. Attackers can leverage this to execute malicious payloads that may include malware, backdoors, or other harmful code that persists across system sessions.
From a cybersecurity perspective, this vulnerability aligns with CWE-78 and CWE-79, representing issues in command execution and input validation within the Windows shell subsystem. The attack pattern follows the TTPs associated with privilege escalation techniques in the MITRE ATT&CK framework, specifically targeting the Windows Explorer process as a vector for code execution. The vulnerability demonstrates how seemingly innocuous file system features can be exploited to create dangerous security breaches, particularly in environments where local user access is possible.
Mitigation strategies should include implementing strict file system access controls, disabling unnecessary shell extensions, and ensuring that system folders are properly secured against unauthorized modifications. Microsoft released patches addressing this vulnerability through Windows Update, but organizations should also consider implementing application whitelisting policies and monitoring for suspicious Desktop.ini file modifications. Regular security audits of system folders and user access permissions can help detect potential exploitation attempts. The vulnerability highlights the importance of secure coding practices in shell components and demonstrates why proper input validation is critical in system-level software components that handle user-supplied data.