How to remediate – Wyse Device Manager HAgent Service Detection

1. Introduction

The Wyse Device Manager HAgent Service Detection vulnerability indicates a Wyse Device Manager HAgent service is running and listening on a network port. This service may present an attack surface if exposed to untrusted networks, allowing potential remote access. Affected systems are typically those using Wyse device management solutions. A successful exploit could compromise confidentiality, integrity, and availability of the managed devices.

2. Technical Explanation

The vulnerability arises from the HAgent service being active and accessible. An attacker can attempt to connect to this service to gain control or extract information. Exploitation requires network access to the port where the service is listening. There is no known CVE associated with this specific detection, but it represents a potential risk based on exposure.

• Root cause: The HAgent service is enabled and listening for connections.
• Exploit mechanism: An attacker could use network tools to connect to the HAgent service port and attempt to execute commands or exploit vulnerabilities within the service itself. For example, an attacker might try to send a crafted request to trigger a buffer overflow or other code execution flaw.
• Scope: Systems running Wyse Device Manager with the HAgent service enabled are affected. Specific versions may be more vulnerable than others depending on patch status.

3. Detection and Assessment

You can confirm if your system is vulnerable by checking for the active HAgent service. A quick check involves identifying the listening port, while a thorough method requires detailed process inspection.

• Quick checks: Use netstat -an | grep to see if the service is listening on a specific port. Replace `` with the identified HAgent port.
• Scanning: Nessus plugin ID 139268 may identify this issue, but results should be verified manually.
• Logs and evidence: Check system logs for events related to the HAgent service startup or network connections on the relevant port. Event IDs will vary depending on the operating system.

netstat -an | grep 5801

4. Solution / Remediation Steps

To fix this issue, disable the HAgent service if it is not required or restrict incoming traffic to its port. These steps are designed to minimise risk and allow for easy rollback.

4.1 Preparation

• Dependencies: Ensure no critical applications rely on the HAgent service. Roll back plan: Re-enable the service if issues occur.
• Change window: Consider a maintenance window for this change, especially in production environments. Approval from system owners may be required.

4.2 Implementation

1. Step 1: Stop the HAgent service using the appropriate operating system command (e.g., systemctl stop wyse-hagenta on Linux).
2. Step 2: Disable the HAgent service from starting automatically at boot (e.g., systemctl disable wyse-hagenta on Linux).
3. Step 3: If disabling is not possible, configure a firewall rule to block incoming traffic to the port used by the HAgent service.

4.3 Config or Code Example

Before

# systemctl status wyse-hagenta
● wyse-hagenta.service - Wyse HAgent Service
   Loaded: loaded (/lib/systemd/system/wyse-hagenta.service; enabled; vendor preset: disabled)
   Active: active (running) since ...

After

# systemctl status wyse-hagenta
● wyse-hagenta.service - Wyse HAgent Service
   Loaded: loaded (/lib/systemd/system/wyse-hagenta.service; disabled)
   Active: inactive (dead) since ...

4.4 Security Practices Relevant to This Vulnerability

List only practices that directly address this vulnerability type. Use neutral wording and examples instead of fixed advice.

• Practice 1: Least privilege – Only enable services required for core functionality, reducing the attack surface.
• Practice 2: Network segmentation – Isolate sensitive systems to limit the impact of potential compromises.

4.5 Automation (Optional)

If suitable, provide a small script or infrastructure code that applies the fix at scale. Only include if safe and directly relevant.

# Example Ansible task to stop and disable the service
- name: Stop and disable Wyse HAgent Service
  service:
    name: wyse-hagenta
    state: stopped
    enabled: false

5. Verification / Validation

Confirm the fix by checking that the HAgent service is no longer running or accessible from the network. A smoke test ensures core functionality remains intact.

• Post-fix check: Run netstat -an | grep and verify no process is listening on the HAgent port.
• Re-test: Re-run the initial detection method (quick checks) to confirm the service is not exposed.
• Smoke test: Verify that any applications dependent on Wyse Device Manager are still functioning correctly.
• Monitoring: Monitor system logs for unexpected restarts of the HAgent service, which could indicate a configuration issue.

netstat -an | grep 5801 # Should return no results

6. Preventive Measures and Monitoring

Suggest only measures that are relevant to the vulnerability type. Use “for example” to keep advice conditional, not prescriptive.

• Baselines: Update security baselines or policies to include a requirement for disabling unnecessary services like HAgent.
• Pipelines: Implement automated checks in CI/CD pipelines to ensure only approved services are running on deployed systems.
• Asset and patch process: Establish a regular review cycle for installed software and enabled services, ensuring they align with business needs.

7. Risks, Side Effects, and Roll Back

• Risk or side effect 2: Incorrect firewall rules could block legitimate traffic. Mitigation: Carefully review and test any firewall changes.
• Roll back: 1) Re-enable the HAgent service using systemctl enable wyse-hagenta and systemctl start wyse-hagenta. 2) Remove or correct any firewall rules that were added.

8. References and Resources

Link only to sources that match this exact vulnerability. Use official advisories and trusted documentation.

• Vendor advisory or bulletin: [https://www.dell.com/support/kbdoc/en-gb/000139268](https://www.dell.com/support/kbdoc/en-gb/000139268)
• NVD or CVE entry: Not applicable for this specific detection.
• Product or platform documentation relevant to the fix: [https://docs.wyse.com/display/WDM54/Managing+Services](https://docs.wyse.com/display/WDM54/Managing+Services)