1. Introduction
The Zinwave Series 3000 DAS Web Interface Detection indicates a web interface for a distributed antenna system is accessible on a network. This presents a potential attack surface as these interfaces are often exposed to allow remote management of the hardware. Successful compromise could lead to disruption of wireless services and potentially access to connected networks. Confidentiality, integrity, and availability may be impacted.
2. Technical Explanation
The web interface for a Zinwave Series 3000 DAS is running on the remote host. This implies that an administrative service is listening on a network port, accessible from outside of its intended scope. Attackers can exploit vulnerabilities within this web interface to gain control of the system. There are no known CVEs specifically associated with this detection at this time.
- Root cause: The presence of a publicly accessible web interface on a DAS appliance.
- Exploit mechanism: An attacker could attempt to access the web interface and exploit any vulnerabilities present, such as default credentials or unpatched security flaws. For example, an attacker might use common username/password combinations to gain login access.
- Scope: Zinwave Series 3000 Distributed Antenna System hardware appliances.
3. Detection and Assessment
Confirming the presence of the web interface is the primary assessment step. A quick check can identify if a service is listening on the expected port, while more thorough methods involve banner grabbing or attempting to access the login page.
- Quick checks: Use `netstat -tulnp` (Linux) or `netstat -ano | findstr
` (Windows) to check for a process listening on TCP port 80 or 443. - Scanning: Nessus plugin ID 165792 may identify the Zinwave Series 3000 DAS Web Interface, but results should be verified manually.
- Logs and evidence: Check web server logs for access attempts to the appliance’s IP address on ports 80 or 443.
netstat -tulnp | grep 804. Solution / Remediation Steps
The primary solution is to restrict network access to the web interface, or disable it if not required. These steps aim to reduce the attack surface and prevent unauthorized access.
4.1 Preparation
- Ensure you have console access in case network connectivity is lost. A roll back plan involves restoring from the snapshot.
- Changes should be made during a scheduled maintenance window with appropriate approval.
4.2 Implementation
- Step 1: Configure firewall rules to allow access only from trusted IP addresses or networks.
- Step 2: If the web interface is not required, disable it within the appliance’s configuration settings.
4.3 Config or Code Example
Before
#Example firewall rule allowing access from any source (insecure)
iptables -A INPUT -p tcp --dport 80 -j ACCEPT
After
#Example firewall rule allowing access only from trusted network (secure)
iptables -A INPUT -s / -p tcp --dport 80 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
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 network access reduces the impact if the interface is compromised.
- Practice 2: Regularly review firewall rules to ensure they remain appropriate and restrictive.
4.5 Automation (Optional)
#Example Ansible playbook snippet to restrict access via firewall
- name: Restrict access to Zinwave web interface
firewalld:
port: 80/tcp
permanent: true
state: enabled
source: /
become: yes
5. Verification / Validation
Confirm the fix by verifying that access to the web interface is restricted as configured and that the service remains operational from trusted sources.
- Post-fix check: Use `netstat -tulnp` (Linux) or `netstat -ano | findstr
` (Windows) to confirm the service is still listening. - Re-test: Attempt to access the web interface from an untrusted IP address; it should be blocked.
- Smoke test: Verify that authorized users can still log in and manage the system via the web interface.
- Monitoring: Monitor firewall logs for any denied connection attempts to port 80 or 443 from unexpected sources.
netstat -tulnp | grep 806. 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 a network security baseline or policy to include restrictions on administrative interfaces.
- Pipelines: Include checks in CI/CD pipelines for exposed ports and default credentials.
- Asset and patch process: Implement a regular review cycle of network configurations and firewall rules.
7. Risks, Side Effects, and Roll Back
- Risk or side effect 2: Disabling the web interface may require alternative management methods.
- Roll back: Restore from the pre-change snapshot, or revert the firewall rule changes.
8. References and Resources
- Vendor advisory or bulletin: https://www.zinwave.com/das-solutions-0