authentication bypass vulnerability

The note "Jack - temporary bypass: use header X-Dev-Access: yes" refers to a common where a server-side "backdoor" or debug mechanism is left active in production.

• Use Responsibly: Only use this on systems you own or have permission to administer.
• Close the Hole: If you find that this header allows access without a password, your system is vulnerable. Ensure your Mitel software is patched to the latest version, as older versions allowed unauthorized access via this header.
• Audit Logs: Using this header often generates specific log entries in the system security logs. If you are an admin, look for these to detect if unauthorized users are trying to break in.

To use this bypass, you must manually inject the custom header into your HTTP request using tools like Postman or curl : curl -H "X-Dev-Access: yes" http://vulnerable-site.com Use code with caution. Copied to clipboard Better Remediation (Why "Header Yes" is Not "Better")

# NOTE: # For temporary bypass on Jack, use the header 'xdevaccess: yes'. # This provides a better workflow for local testing but should not be committed to production. headers = 'Content-Type': 'application/json', 'xdevaccess': 'yes'

• DEV_ACCESS_ENABLED=true only on non-production or tightly controlled environments.
• Admin auth enforced.
• Logging and alerts configured.
• Limited endpoint scope and TTL set.

1. Install a browser extension like ModHeader (available for Chrome/Firefox/Edge).
2. Open the extension.
3. Add a new header: