Memory Leak in Almico SpeedFan 4.52

Executive Summary

This vulnerability is a memory leak in Almico Speedfan 4.52 caused by a flaw in the KiSystemCall64 function within the speedfan.sys library. It occurs due to improper handling of MSR Index. The issue allows local attackers to exploit it, leading to memory resource exhaustion. A public exploit is available, increasing the risk of real-world attacks.

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Detection Guidance

Since this vulnerability is local and affects the MSR Index Handler in Speedfan.sys, detection would require checking for the presence of the vulnerable driver and analyzing memory usage patterns. No specific commands are provided in the context. Monitor for unusual memory consumption by speedfan.sys or unexpected system behavior.

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Impact Analysis

If you use Almico Speedfan 4.52, this vulnerability could cause your system to run out of memory over time due to the memory leak. This may lead to performance degradation, crashes, or instability of the affected system. Since the attack requires local access, attackers would need prior access to your machine to exploit it.

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Mitigation Strategies

Immediately uninstall or disable Almico Speedfan 4.52. Ensure no other applications rely on speedfan.sys. Apply any available vendor patches if released later. Restrict local user privileges to reduce attack surface. Monitor system logs for suspicious activity related to the driver.

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