Executive Summary

CVE-2023-53965 is a local privilege escalation vulnerability in SOUND4 Server Service version 4.1.102 caused by an unquoted service path. This flaw allows a local non-privileged user to place malicious executables in directories within the system root path. Because the service's binary path is not properly quoted, when the service starts or the system reboots, the operating system may incorrectly resolve the executable path and run the malicious code with elevated LocalSystem privileges, effectively allowing the attacker to execute arbitrary code with high-level system rights. [1, 2, 3]

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Impact Analysis

This vulnerability can allow a local non-privileged user to escalate their privileges to LocalSystem level, which is the highest privilege on a Windows system. By exploiting the unquoted service path, an attacker can execute arbitrary code with elevated privileges, potentially leading to full system compromise, unauthorized access to sensitive data, and the ability to install persistent malware or disrupt system operations. [1, 2, 3]

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Detection Guidance

This vulnerability can be detected by checking the service path of the SOUND4 Server Service for unquoted paths. On a Windows system, you can use the command: sc qc "SOUND4 Server" to query the service configuration and inspect the BINARY_PATH_NAME for missing quotes. If the path to the executable is unquoted and contains spaces, it is vulnerable. Additionally, you can check for suspicious executables placed in directories along the unquoted path that could be executed with elevated privileges. [1, 2, 3]

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Mitigation Strategies

Immediate mitigation steps include correcting the unquoted service path by adding quotes around the executable path in the service configuration to prevent the OS from misinterpreting the path. Alternatively, restrict write permissions on directories in the service path to prevent unauthorized users from placing malicious executables. If possible, update or patch the SOUND4 Server Service to a version that addresses this vulnerability. As a temporary measure, monitor and remove any suspicious files in the system root path that could be exploited. [1, 2, 3]

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