A significant security vulnerability (CVE-2022-2474) has been identified in the Haas Controller version, specifically pertaining to the device's lack of support for authentication in the "Ethernet Q Commands" service. This oversight allows unauthorized users on the same network segment, whether local or remote, to easily access the service and write potentially malicious macros to the device.

Exploit Details

The "Ethernet Q Commands" service, which is intended for authorized users to send commands and retrieve information from the CNC machine, is supposed to require proper authentication to ensure that only authorized individuals can access its features. Unfortunately, in the Haas Controller version, this authentication is absent, leaving the door wide open for potentially malicious actors to exploit this security weakness.

Code Snippet

import socket

TCP_PORT = 23  # Default Haas Controller Port

# Connect to the Haas Controller using TCP/IP
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Send an unauthorized "Ethernet Q Commands" macro to the Haas Controller
attack_payload = b"TEST_MACRO"

# Retrieve the response from the Haas Controller
data = sock.recv(BUFFER_SIZE)
print("Received data:", data)


To protect your Haas Controller from this vulnerability, it's crucial to take the following steps

1. Update your Haas Controller firmware to the latest version, as newer versions likely have addressed this security issue. Contact your local Haas distributor for information on how to obtain and install the firmware update.

2. Implement proper network segmentation and access control lists (ACLs) to restrict access to the CNC machine to authorized individuals only.

3. Configure your machine's firewall rules to block incoming connections to the "Ethernet Q Commands" service from unauthorized IP addresses.

4. Regularly review the CNC machine's logs, checking for evidence of unauthorized access or macro installations.

Original References

- CVE-2022-2474: National Vulnerability Database (NVD)
- Haas Controller Firmware Update: Haas Automation Support Page

In conclusion, the lack of authentication support in Haas Controller version for the "Ethernet Q Commands" service (CVE-2022-2474) poses a considerable threat to the security of CNC machines, potentially allowing unauthorized users to write malicious macros to the device. To safeguard your equipment, it's critical to update your device's firmware, implement proper network segmentation and firewall rules, and regularly review logs for signs of unauthorized activity.


Published on: 10/28/2022 18:15:00 UTC
Last modified on: 11/02/2022 15:44:00 UTC