How to remediate – Cisco Telepresence Management Suite Web Detection

1. Introduction

Cisco Telepresence Management Suite Web Detection identifies whether a video conferencing management suite is running on a remote host. This application manages video conferencing systems and could allow unauthorized access if exposed. Affected systems are typically those using Cisco’s collaboration tools, potentially impacting the confidentiality of meetings and system integrity. A successful exploit could lead to information disclosure or remote control of the conferencing suite.

2. Technical Explanation

This detection script checks for the presence of Cisco Telepresence Management Suite on Windows hosts using provided credentials. The vulnerability lies in the potential exposure of a web interface used to manage the system, which may be accessible without proper authentication or with default credentials. An attacker could gain access to this interface and potentially control the video conferencing suite.

• Root cause: The script detects whether the Cisco Telepresence Management Suite is installed and running on the remote host.
• Exploit mechanism: An attacker would use the detected web interface, attempting default credentials or exploiting vulnerabilities in the management application to gain access.
• Scope: Windows systems running Cisco Telepresence Management Suite are affected.

3. Detection and Assessment

Confirming whether a system is vulnerable involves checking for the presence of the software and its associated web interface. A quick check can identify if the software is installed, while a thorough method verifies accessibility of the management interface.

• Quick checks: Run wmic product get name in Command Prompt to list installed programs; look for “Cisco Telepresence Management Suite”.
• Scanning: Nessus plugin ID 139865 can detect this vulnerability, but results should be verified.
• Logs and evidence: Check application logs located within the Cisco Telepresence Management Suite installation directory for access attempts or configuration changes.

wmic product get name | findstr "Cisco Telepresence Management Suite"

4. Solution / Remediation Steps

Fixing this issue involves securing or removing the exposed web interface. These steps aim to minimize access and prevent unauthorized control of the system.

4.1 Preparation

• Change window needs: Coordinate with IT teams to minimize disruption during service stops and configuration updates. Approval may be needed by security or collaboration leads.

4.2 Implementation

1. Step 1: Change the default password for the Cisco Telepresence Management Suite web interface.
2. Step 2: Restrict access to the web interface using Windows Firewall, allowing only trusted IP addresses.
3. Step 3: If the suite is not actively used, consider uninstalling it from the system.

4.3 Config or Code Example

Before

After

4.4 Security Practices Relevant to This Vulnerability

Practices that directly address this vulnerability type include least privilege and secure defaults. These help reduce the impact of exposure and prevent unauthorized access.

• Practice 1: Least privilege – limit user accounts with access to the system, reducing potential damage from compromised credentials.

4.5 Automation (Optional)

5. Verification / Validation

Confirming the fix involves verifying that access is restricted and the default credentials no longer work. A smoke test ensures core functionality remains operational if applicable.

• Post-fix check: Attempt to log in with default credentials via the web interface; access should be denied.
• Re-test: Re-run the initial detection script (wmic product get name) and confirm that the software is still present if it was not uninstalled, but inaccessible without valid credentials.
• Monitoring: Monitor application logs for failed login attempts or unauthorized access.

Attempt to log into web interface with default username/password - should fail.

6. Preventive Measures and Monitoring

Preventive measures include updating security baselines and incorporating checks in CI pipelines. These help identify and address similar vulnerabilities proactively.

• Baselines: Update a security baseline to require strong passwords for all applications, including Cisco Telepresence Management Suite.
• Pipelines: Add vulnerability scanning as part of the CI/CD pipeline to detect exposed interfaces during deployment.
• Asset and patch process: Implement a regular review cycle for installed software and associated configurations.

7. Risks, Side Effects, and Roll Back

Known risks include potential disruption to video conferencing services if configuration changes are incorrect. Roll back steps involve restoring from backup or reverting firewall rules.

• Risk or side effect 2: Changing passwords without proper documentation can lead to lockout issues; document all changes.
• Roll back: Restore from backup if necessary, or revert firewall rules using netsh advfirewall firewall delete rule name="Cisco Telepresence Management Suite Access".

8. References and Resources

• Vendor advisory or bulletin: http://www.nessus.org/u?edb26e77
• NVD or CVE entry: No specific CVE identified for this detection script.
• Product or platform documentation relevant to the fix: Cisco Telepresence Management Suite Administration Guide