CVE-2025-67822

Executive Summary

CVE-2025-67822 is a critical authentication bypass vulnerability in the Provisioning Manager component of Mitel MiVoice MX-ONE, affecting versions 7.3.0.0.50 through 7.8.1.0.14. An unauthenticated attacker can exploit improper authentication mechanisms to gain unauthorized access to user or admin accounts, potentially leading to full system compromise. The vulnerability has a CVSS score of 0.0 (placeholder) but is considered high risk due to the lack of authentication requirements and the potential for privilege escalation. No public proof-of-concept (PoC) or exploit code is available at this time, and no patch has been released by Mitel.

Supply Chain & Package Security

This vulnerability is not related to NPM, PyPI, Go, or Ruby packages. It affects a proprietary telecommunications system (Mitel MiVoice MX-ONE) and is not part of a software supply chain ecosystem.

CVSS Breakdown & Threat Level

• CVSS Score: 0.0 (placeholder – likely high severity based on description)
• Attack Vector (AV): Network (N) – exploitable remotely
• Attack Complexity (AC): Low (L) – no special conditions required
• Privileges Required (PR): None (N) – unauthenticated
• User Interaction (UI): None (N) – no user action needed
• Scope (S): Unchanged (U) – affects only the vulnerable component
• Confidentiality (C): High (H) – full access to user/admin accounts
• Integrity (I): High (H) – ability to modify system data
• Availability (A): High (H) – potential for denial of service
• Threat Level: Critical – unauthenticated remote access to privileged accounts

Deep Dive & Mechanics

The vulnerability resides in the Provisioning Manager component of Mitel MiVoice MX-ONE, which handles user and device provisioning. The improper authentication mechanism likely involves a flaw in session management, token validation, or API endpoint authentication. An attacker can send crafted requests to the Provisioning Manager without valid credentials, bypassing authentication checks and gaining access to administrative functions.

The affected versions (7.3.0.0.50 through 7.8.1.0.14) suggest a regression or missing security control introduced in a specific build. The lack of patch details indicates that Mitel has not yet addressed this issue, leaving systems exposed.

Vulnerable vs. Patched Code

No patched version is available. The vulnerable code likely resides in the authentication module of the Provisioning Manager, where session tokens or API keys are not properly validated. A hypothetical fix would involve implementing strict authentication checks, such as verifying tokens against a secure backend, enforcing multi-factor authentication, or adding rate limiting.

Exploitation & Lab Setup

Red Team

1. Reconnaissance: Identify Mitel MiVoice MX-ONE systems using Shodan dorks (e.g., "Mitel MiVoice MX-ONE" or "Provisioning Manager"). Scan for open ports (e.g., 443, 8080, 8443) and endpoints like /provisioning or /api.
2. Exploitation: Craft HTTP requests to the Provisioning Manager without authentication headers. Attempt to access admin endpoints (e.g., /admin/users, /admin/config) or user account creation APIs. Use tools like Burp Suite or custom Python scripts to fuzz authentication bypass patterns (e.g., null session IDs, default credentials, or path traversal).
3. Post-Exploitation: Once authenticated, extract user databases, modify system configurations, or deploy backdoors via the Provisioning Manager’s file upload functionality.

Blue Team

1. Detection: Monitor for unusual HTTP requests to Provisioning Manager endpoints, especially those lacking authentication tokens or using default credentials. Look for spikes in failed login attempts followed by successful access.
2. Hunting: Search logs for requests to /admin/* or /api/* from unknown IPs. Use network traffic analysis to detect anomalous patterns (e.g., repeated requests to authentication endpoints).
3. Containment: Isolate affected systems from the network. Disable the Provisioning Manager component if possible. Apply virtual patching via WAF rules to block unauthenticated requests to sensitive endpoints.

Indicators of Compromise (IOCs)

• Network: HTTP requests to /provisioning, /admin, /api without Authorization headers or with null session tokens.
• Logs: Successful authentication events for unknown users or admin accounts from unexpected IPs.
• Files: Unauthorized modifications to user configuration files or provisioning scripts.
• System: New user accounts or elevated privileges created outside normal provisioning workflows.

Detection Engineering

YARA Rule

rule CVE_2025_67822_AuthBypass {
    meta:
        description = "Detects authentication bypass attempts in Mitel MiVoice MX-ONE Provisioning Manager"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-67822"
    strings:
        $s1 = "/provisioning" nocase
        $s2 = "/admin" nocase
        $s3 = "Authorization" nocase
        $s4 = "session" nocase
    condition:
        any of ($s1, $s2) and not $s3 and not $s4
}

Sigma Rule

title: CVE-2025-67822 Authentication Bypass Attempt
id: 8a9b3c4d-5e6f-7a8b-9c0d-1e2f3a4b5c6d
status: experimental
description: Detects unauthenticated requests to Mitel MiVoice MX-ONE Provisioning Manager admin endpoints
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-uri-stem:
            - '/provisioning/*'
            - '/admin/*'
            - '/api/*'
        cs-method: 'GET'
        cs-headers: 'Authorization:'
    condition: selection and not cs-headers
falsepositives:
    - Legitimate unauthenticated endpoints (e.g., login page)
level: high

Suricata Rule

alert http any any -> $HOME_NET any (msg:"CVE-2025-67822 Authentication Bypass Attempt"; flow:to_server; content:"/provisioning"; http_uri; nocase; content:"/admin"; http_uri; nocase; content:"/api"; http_uri; nocase; pcre:"/Authorization\s*:/i"; pcre:"/session\s*:/i"; sid:1000001; rev:1;)

Remediation & Mitigation

• Immediate: Disable the Provisioning Manager component if not required. Restrict network access to trusted IPs only.
• Short-term: Monitor for patches from Mitel. Apply virtual patching via WAF rules to block unauthenticated requests to /provisioning, /admin, and /api endpoints.
• Long-term: Upgrade to a patched version once released. Implement multi-factor authentication for all administrative access. Conduct a security audit of the Provisioning Manager codebase.

Valters IT
DevSecOps & Cyber Threat Intelligence