CVE-2018-25307 in Pro
Summary
by MITRE • 04/29/2026
SysGauge Pro 4.6.12 contains a local buffer overflow vulnerability in the Register function that allows local attackers to overwrite the structured exception handler by supplying a crafted unlock key. Attackers can inject shellcode through the Unlock Key field during registration to execute arbitrary code with application privileges.
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Analysis
by VulDB Data Team • 04/30/2026
The vulnerability in SysGauge Pro 4.6.12 represents a critical buffer overflow flaw within the application's registration mechanism that exposes the software to local privilege escalation attacks. This issue manifests specifically within the Register function where insufficient input validation allows attackers to manipulate the unlock key field beyond its intended buffer boundaries. The flaw stems from improper bounds checking during the processing of user-supplied data, creating an exploitable condition that can be leveraged by malicious actors with local system access. The vulnerability is classified as a local buffer overflow and maps to CWE-121 which describes heap-based buffer overflow conditions where insufficient checks allow data to overwrite adjacent memory locations. The attack vector requires local system access and involves crafting a malicious unlock key that exceeds the allocated buffer space, thereby enabling the overwrite of critical memory structures including the structured exception handler.
The operational impact of this vulnerability extends beyond simple code execution as it allows attackers to escalate privileges to the application context, potentially enabling them to access sensitive system resources or perform unauthorized operations within the application's security boundaries. When an attacker supplies a crafted unlock key, the buffer overflow enables the injection of shellcode directly into the application's memory space, bypassing typical security mechanisms that would normally prevent such unauthorized code execution. The structured exception handler overwrite is particularly concerning as it can disrupt normal application flow and potentially provide attackers with additional control over the execution environment. This vulnerability aligns with ATT&CK technique T1059 which covers command and scripting interpreter usage, and T1068 which addresses exploit for privilege escalation. The attack requires minimal sophistication but can result in significant compromise of the system's integrity and confidentiality.
Mitigation strategies for this vulnerability must address both the immediate code-level fixes and broader security posture improvements. The primary remediation involves implementing proper input validation and bounds checking within the Register function to prevent buffer overflows from occurring. This includes using safe string handling functions, implementing stack canaries, and employing modern compiler security features such as stack protection mechanisms. Organizations should also consider applying the vendor's official patch or update as soon as it becomes available, while implementing additional security controls such as application whitelisting to restrict execution of unauthorized code. Network segmentation and privilege separation can help reduce the potential impact if exploitation occurs, though the local nature of this vulnerability means that traditional network-based protections may be insufficient. Regular security assessments and code reviews focusing on input validation and memory management practices should be implemented to identify and remediate similar vulnerabilities in other applications. The vulnerability highlights the importance of following secure coding practices and adhering to established security frameworks that emphasize proper resource management and input sanitization to prevent such exploitable conditions from being introduced into software systems.