CVE-2025-6241 in SyStrack
Summary
by MITRE • 07/27/2025
LsiAgent.exe, a component of SysTrack from Lakeside Software, attempts to load several DLL files which are not present in the default installation. If a user-writable directory is present in the SYSTEM PATH environment variable, the user can write a malicious DLL to that directory with arbitrary code. This malicious DLL is executed in the context of NT AUTHORITY\SYSTEM upon service start or restart, due to the Windows default dynamic-link library search order, resulting in local elevation of privileges.
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Analysis
by VulDB Data Team • 07/31/2025
The vulnerability identified as CVE-2025-6241 affects LsiAgent.exe, a component within Lakeside Software's SysTrack suite designed for system monitoring and tracking. This flaw represents a classic insecure library loading vulnerability that exploits the Windows dynamic-link library search order mechanism. The root cause lies in how LsiAgent.exe handles DLL resolution during its execution lifecycle, specifically when attempting to load several DLL files that are not part of the standard installation package. When these required DLLs are missing from the default installation paths, the Windows loader searches through the system PATH environment variable in a predetermined order, creating an exploitable condition where attacker-controlled DLLs can be loaded instead of legitimate system components.
The technical exploitation of this vulnerability occurs through a privilege escalation vector that leverages the Windows PATH search order behavior. When LsiAgent.exe starts or restarts, it attempts to load DLL files from the system PATH without proper validation or secure loading practices. If a user-writable directory exists within this PATH, an attacker can place a malicious DLL with the same name as the missing component in that directory. The Windows loader, following its default search order, will find and execute the attacker-controlled DLL before checking the legitimate system directories. This execution occurs with the highest privilege level available to the service, specifically NT AUTHORITY\SYSTEM, which grants complete control over the affected system.
The operational impact of this vulnerability is significant as it enables local privilege escalation from a standard user account to SYSTEM level privileges without requiring any specialized tools or advanced exploitation techniques. The attack requires only that the target system has a user-writable directory in the PATH environment variable, a condition that is commonly present in many Windows installations. Once successfully exploited, the malicious DLL executes with SYSTEM privileges, allowing attackers to perform any action on the compromised system including installing software, modifying system files, creating accounts, accessing sensitive data, and potentially establishing persistent access. This vulnerability is particularly dangerous in enterprise environments where multiple users may have local access to systems running SysTrack.
Mitigation strategies for CVE-2025-6241 should focus on addressing the root cause through secure coding practices and system hardening measures. Organizations should immediately update to the latest version of SysTrack from Lakeside Software that contains the patched LsiAgent.exe component with proper DLL loading mechanisms. System administrators should conduct thorough PATH environment variable audits to identify and remove user-writable directories from system PATH entries, particularly those that are not essential for legitimate system operations. The implementation of Windows Defender Application Control or similar application whitelisting solutions can prevent execution of unauthorized DLL files regardless of the PATH search order. Additionally, following the principle of least privilege by ensuring that user accounts do not have write permissions to directories in the system PATH significantly reduces the attack surface. This vulnerability aligns with CWE-427 Uncontrolled Search Path Element and is categorized under the ATT&CK technique T1068 Exploitation for Privilege Escalation, making it a critical concern for cybersecurity teams implementing defense-in-depth strategies.