1. Introduction
ManageEngine Network Configuration Manager (NCM) is a network configuration change management web application. It allows administrators to automate and manage network device configurations, but its presence introduces a potential attack surface. Successful exploitation could lead to unauthorized access to network configurations. This affects systems running the NCM software.
2. Technical Explanation
ManageEngine Network Configuration Manager (NCM) is accessible via a web interface. The application’s default configuration may expose it to remote attacks. An attacker gaining access can potentially modify network device configurations, leading to denial of service or other security breaches. There are no known CVEs associated with simply detecting the presence of NCM.
- Root cause: Presence of a web-based management application for network configuration changes.
- Exploit mechanism: An attacker could attempt to exploit vulnerabilities within the NCM software itself, or use compromised credentials to access and modify configurations.
- Scope: ManageEngine Network Configuration Manager (NCM) installations on any platform supporting its deployment.
3. Detection and Assessment
Confirming the presence of NCM can be done through port scanning and web interface analysis. A thorough assessment involves checking for default credentials and known vulnerabilities.
- Quick checks: Check if port 80 or 443 is open on systems expected to host NCM, and attempt to access the default login page.
- Scanning: Nessus plugin ID 16729 can detect ManageEngine Network Configuration Manager. This is an example only.
- Logs and evidence: Web server logs may show requests to paths associated with NCM (e.g., /ncm/).
# Example command placeholder:
# nmap -p 80,443
4. Solution / Remediation Steps
The primary remediation step is to secure the NCM installation and ensure it’s kept up-to-date with security patches.
4.1 Preparation
- Services: No services need to be stopped for basic hardening.
4.2 Implementation
- Step 1: Change the default administrator password.
- Step 2: Enable multi-factor authentication (MFA) if available.
- Step 3: Review and restrict access control lists (ACLs) to limit who can access NCM.
4.3 Config or Code Example
There is no specific config change for detection, but this shows how to secure the login.
Before
# Default credentials are often used
admin / admin
After
# Strong, unique password set for administrator account.
admin /
4.4 Security Practices Relevant to This Vulnerability
Practices that directly address this vulnerability type include strong authentication and least privilege access.
- Practice 1: Least privilege – limit user access to only the necessary functions within NCM.
- Practice 2: Strong authentication – enforce complex passwords and multi-factor authentication.
4.5 Automation (Optional)
No automation is provided as this relates to detection, not remediation.
5. Verification / Validation
- Post-fix check: Attempt to log in with default credentials; access should be denied.
- Re-test: Re-run the quick checks from Section 3 to confirm that default login attempts fail.
- Smoke test: Verify that authorized users can still manage network configurations through NCM.
# Post-fix command and expected output
# Attempting login with admin/admin should result in an "Invalid credentials" error.
6. Preventive Measures and Monitoring
Preventive measures include regular security audits, vulnerability scanning, and a robust patch management process.
- Baselines: Update your security baseline to require strong passwords and MFA for all web applications.
- Pipelines: Integrate vulnerability scanning into your CI/CD pipeline to identify potential weaknesses in NCM configurations.
- Asset and patch process: Implement a regular patch cycle for NCM, applying security updates promptly.
7. Risks, Side Effects, and Roll Back
Risks include service disruption if changes are not tested properly. Roll back by restoring from the pre-change backup.
- Risk or side effect 1: Incorrect configuration may cause NCM to become inaccessible; test all changes in a non-production environment first.
8. References and Resources
Links to official documentation and advisories related to ManageEngine Network Configuration Manager.
- Vendor advisory or bulletin: https://www.manageengine.com/network-configuration-manager/