How to remediate – HALO Network Server Detection

1. Introduction

HALO Network Server Detection indicates a game server is running on a remote host. This poses a risk as these servers can be targeted by attackers looking to compromise systems for malicious purposes, such as data theft or denial-of-service attacks. Systems typically affected are those hosting Internet and Local Area Network (LAN) games. A successful exploit could lead to confidentiality, integrity, and availability impacts.

2. Technical Explanation

The vulnerability arises from the presence of a HALO Network Server running on the host. Attackers can remotely probe for these servers and attempt exploitation if vulnerabilities exist within the server software itself. Exploitation typically involves sending malicious data to the server, potentially leading to code execution or denial-of-service. There are no known CVEs associated with this detection; it is a general indicator of potential risk.

• Root cause: The presence of an unneeded network service running on the host.
• Exploit mechanism: An attacker could scan for open ports associated with HALO Network Server and attempt to exploit known vulnerabilities in the server software.
• Scope: Systems running any version of HALO Network Server are affected.

3. Detection and Assessment

To confirm a system is vulnerable, check if the HALO Network Server service is running. A thorough method involves examining network connections for activity on ports associated with the server.

• Quick checks: Use the following command to list listening ports and identify the HALO Network Server process: netstat -an | findstr ":" (replace with known HALO Network Server port(s)).
• Scanning: Nessus plugin ID 138790 can detect the presence of HALO Network Server. This is an example only and may require updating.
• Logs and evidence: Check system event logs for events related to the HALO Network Server process or network connections on associated ports.

netstat -an | findstr ":27960"

4. Solution / Remediation Steps

To fix this issue, disable the HALO Network Server service if it is not needed or filter incoming traffic to its port.

4.1 Preparation

• Ensure you have administrator privileges. A roll back plan involves re-enabling the service, if necessary.
• Change windows may be needed depending on organizational policy; approval from IT security may be required.

4.2 Implementation

1. Step 1: Stop the HALO Network Server service using the Services console (services.msc).
2. Step 2: Disable the HALO Network Server service to prevent it from automatically restarting.
3. Step 3: If needed, configure the firewall to block incoming traffic on ports associated with HALO Network Server.

4.3 Config or Code Example

Before

sc queryex HALONetworkServer

After

sc config HALONetworkServer start= disabled

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. For example: least privilege, input validation, safe defaults, secure headers, patch cadence.

• Practice 1: Least privilege – Only allow necessary services to run on systems.
• Practice 2: Network segmentation – Isolate game servers from critical network resources.

4.5 Automation (Optional)

# PowerShell example to disable service
Stop-Service -Name "HALONetworkServer" -Force
Set-Service -Name "HALONetworkServer" -StartupType Disabled

5. Verification / Validation

Confirm the fix by verifying that the HALO Network Server service is stopped and disabled, and that network connections on associated ports are no longer active.

• Post-fix check: Run sc queryex HALONetworkServer; the output should indicate the service state is “STOPPED” and startup type is “DISABLED”.
• Re-test: Re-run the quick check from section 3 (netstat -an | findstr ":27960") to confirm no listening ports are associated with HALO Network Server.
• Smoke test: Verify that other essential network services remain functional.
• Monitoring: Monitor system event logs for any unexpected events related to the HALO Network Server process.

sc queryex HALONetworkServer

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 restrict unnecessary network services.
• Pipelines: Implement automated checks in CI/CD pipelines to identify and block unauthorized software installations.
• Asset and patch process: Establish a regular review cycle for installed software and configurations.

7. Risks, Side Effects, and Roll Back

Disabling the HALO Network Server service may impact game functionality if it is required. Rolling back involves re-enabling the service.

• Roll back: Step 1: Re-enable the HALO Network Server service using the Services console (services.msc).

8. References and Resources

• Vendor advisory or bulletin: No specific vendor advisory available for general detection.
• NVD or CVE entry: No specific CVE associated with this detection.
• Product or platform documentation relevant to the fix: Refer to HALO Network Server documentation for service configuration details.