Executive Summary

This vulnerability is an unquoted service path issue in the Epson USB Display version 1.6.0.0, specifically in the EMP_UDSA service that runs with LocalSystem privileges. Because the service path contains spaces and is not enclosed in quotes, an attacker with local access can place malicious executables in intermediate directories of the service path. When the system attempts to execute the service, it may run the malicious executable instead of the legitimate one, allowing the attacker to escalate privileges and gain elevated system access. [1, 3]

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Impact Analysis

Exploiting this vulnerability allows an attacker with local access to escalate their privileges to LocalSystem level, which is the highest privilege on a Windows system. This means the attacker can gain full control over the affected system, potentially compromising confidentiality, integrity, and availability of data and system resources. [1, 3]

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Detection Guidance

This vulnerability can be detected by checking the service path of the EMP_UDSA service for unquoted spaces. On a Windows system, you can use commands such as: 1) Using PowerShell: Get-WmiObject win32_service | Where-Object { $_.Name -eq 'EMP_UDSA' } | Select-Object Name, PathName 2) Using Command Prompt: sc qc EMP_UDSA These commands will show the executable path of the service. If the path contains spaces and is not enclosed in quotes, the system is vulnerable to this unquoted service path issue. [3]

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Mitigation Strategies

To mitigate this vulnerability immediately, you should enclose the service executable path in quotes to prevent the system from executing malicious executables placed in intermediate directories. This can be done by modifying the service configuration to quote the path. Alternatively, ensure that no untrusted users have write access to directories in the service path, and apply the latest patches or updates from Epson if available. [1, 3]

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