CVE-2018-25307 Overview
CVE-2018-25307 is a local buffer overflow vulnerability affecting SysGauge Pro version 4.6.12. The vulnerability exists within the Register function and allows local attackers to overwrite the structured exception handler (SEH) by supplying a specially crafted unlock key. Successful exploitation enables attackers to inject shellcode through the Unlock Key field during registration, resulting in arbitrary code execution with the privileges of the application.
Critical Impact
Local attackers can achieve arbitrary code execution by exploiting the buffer overflow in the registration function, potentially leading to full system compromise with application-level privileges.
Affected Products
- SysGauge Pro 4.6.12
Discovery Timeline
- 2026-04-29 - CVE-2018-25307 published to NVD
- 2026-04-29 - Last updated in NVD database
Technical Details for CVE-2018-25307
Vulnerability Analysis
This vulnerability is classified as CWE-120 (Buffer Copy without Checking Size of Input), commonly known as a classic buffer overflow. The Register function in SysGauge Pro 4.6.12 fails to properly validate the length of user-supplied input in the Unlock Key field before copying it to a fixed-size buffer. When an attacker provides an excessively long unlock key, the input overflows the allocated buffer and overwrites adjacent memory, including the structured exception handler (SEH) chain.
The attack requires local access to the system where SysGauge Pro is installed. An attacker with local access can craft a malicious unlock key containing a carefully constructed payload that first corrupts the SEH pointer and then redirects execution flow to attacker-controlled shellcode embedded within the input itself.
Root Cause
The root cause of this vulnerability is insufficient input validation in the Register function. The application allocates a fixed-size buffer for the unlock key but does not enforce length restrictions on user input before performing the buffer copy operation. This allows attackers to supply input exceeding the buffer's capacity, leading to memory corruption and potential code execution.
Attack Vector
The attack vector is local, requiring the attacker to have access to the machine where SysGauge Pro is installed. The exploitation workflow involves:
- Launching the SysGauge Pro application
- Navigating to the registration dialog
- Entering a maliciously crafted unlock key containing padding, SEH overwrite values, and shellcode
- Triggering the buffer overflow when the application processes the registration attempt
- Gaining code execution when the corrupted SEH handler is invoked
The SEH overwrite technique allows attackers to bypass certain memory protections by leveraging the Windows exception handling mechanism. When an exception occurs, the corrupted SEH pointer redirects execution to attacker-supplied code rather than the legitimate exception handler.
For detailed technical information and proof-of-concept details, refer to the Exploit-DB entry #44455 and the VulnCheck Advisory.
Detection Methods for CVE-2018-25307
Indicators of Compromise
- Presence of SysGauge Pro version 4.6.12 on monitored systems
- Unusual crash logs or exception handling errors from the SysGauge Pro application
- Signs of shellcode execution or suspicious process spawning from SysGauge.exe
- Anomalous registry modifications or file system activity following SysGauge Pro execution
Detection Strategies
- Monitor for SysGauge Pro installations matching the vulnerable version 4.6.12
- Implement endpoint detection rules to identify SEH overwrite attempts targeting Windows applications
- Deploy application whitelisting to restrict unauthorized code execution
- Configure crash dump analysis to detect exploitation attempts through abnormal exception patterns
Monitoring Recommendations
- Enable Windows Event logging for application crashes and exception handling events
- Monitor process creation events from SysGauge Pro for suspicious child processes
- Implement file integrity monitoring on SysGauge Pro installation directories
- Review audit logs for unauthorized registration attempts or license key modifications
How to Mitigate CVE-2018-25307
Immediate Actions Required
- Identify all systems running SysGauge Pro version 4.6.12 and prioritize remediation
- Consider uninstalling or disabling SysGauge Pro until a patched version is available
- Restrict local access to systems running the vulnerable software
- Implement application control policies to limit execution of potentially vulnerable applications
Patch Information
No vendor patch information is currently available in the CVE data. Organizations should contact the SysGauge Pro vendor directly to inquire about security updates. Monitor the VulnCheck Advisory for updates on remediation options.
Workarounds
- Uninstall SysGauge Pro 4.6.12 if the application is not business-critical
- Implement strict access controls to limit which users can interact with the SysGauge Pro registration function
- Deploy endpoint protection solutions capable of detecting and blocking buffer overflow exploitation attempts
- Enable Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR) at the operating system level to increase exploitation difficulty
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
