1. Introduction
The Cisco Small Business Wireless Access Point Web Detection vulnerability checks for the presence of a web management interface on systems potentially running Cisco Small Business wireless access points. This matters to businesses as an exposed web interface could allow attackers to gain unauthorized access and control of the device, compromising network security. Confidentiality, integrity, and availability may be impacted if an attacker gains access.
2. Technical Explanation
The vulnerability occurs when a Cisco Small Business Wireless Access Point’s web management interface is accessible from the network. An attacker can then attempt to log in using default or stolen credentials to gain control of the device. There is no CVE associated with this detection, as it’s a general check for exposed interfaces rather than a specific flaw. An attacker could access the web interface via its IP address and browser, potentially leading to full system compromise if valid credentials are provided.
- Root cause: The web management interface is enabled and accessible on the network without sufficient protection.
- Exploit mechanism: An attacker attempts to connect to the device’s web interface using a standard web browser, then tries default or brute-forced credentials.
- Scope: Cisco Small Business Wireless Access Points are affected.
3. Detection and Assessment
To confirm if a system is vulnerable, first check for an accessible web interface. Then attempt to gather version information.
- Quick checks: Use a web browser to navigate to the IP address of the suspected device. If a Cisco Small Business login page appears, this indicates potential vulnerability.
- Scanning: Nessus can detect this issue using plugin ID 6dbece18, ad31d943 and 06b18299 as examples.
- Logs and evidence: Review web server logs for access attempts to the device’s IP address on port 80 or 443.
ping 4. Solution / Remediation Steps
To fix this issue, secure or disable the web management interface.
4.1 Preparation
- Ensure you have access to the device’s command-line interface (CLI) or web interface. A rollback plan involves restoring the backed-up configuration if needed.
- A change window may be needed depending on network impact and approval requirements.
4.2 Implementation
- Step 1: Log in to the Cisco Small Business Wireless Access Point’s web interface or CLI.
- Step 2: Disable remote management access if possible, limiting access to only local networks.
- Step 3: Change the default administrator password to a strong, unique value.
- Step 4: If the web interface is not required, disable it entirely.
4.3 Config or Code Example
Before
After
4.4 Security Practices Relevant to This Vulnerability
Several security practices can help prevent this issue.
- Practice 1: Least privilege – restrict access to the device’s web interface only to authorized personnel.
- Practice 2: Strong passwords – use strong, unique passwords for all administrator accounts.
4.5 Automation (Optional)
Automation is not typically suitable for this vulnerability due to the need for specific configuration changes per device.
5. Verification / Validation
Confirm the fix by verifying that remote access is disabled or a strong password is required.
- Post-fix check: Attempt to access the web interface from an external network. Access should be blocked, or a valid password prompt should appear.
- Re-test: Re-run the initial detection method (web browser access) to confirm that unauthorized access is no longer possible.
- Monitoring: Monitor web server logs for failed login attempts or unexpected access patterns.
ping 6. Preventive Measures and Monitoring
Update security baselines to include strong password requirements and remote management restrictions.
- Baselines: Update your network device baseline or policy to enforce strong passwords and disable unnecessary services like web management interfaces.
- Asset and patch process: Review the device’s configuration regularly as part of a routine security audit.
7. Risks, Side Effects, and Roll Back
Disabling remote management may impact administrators who rely on it for access.
- Risk or side effect 1: Disabling remote management could require local access for administration.
- Risk or side effect 2: Incorrect configuration changes could disrupt network connectivity.
8. References and Resources
Links to official advisories and trusted documentation.
- Vendor advisory or bulletin: http://www.nessus.org/u?6dbece18
- NVD or CVE entry: Not applicable for this general detection.
- Product or platform documentation relevant to the fix: http://www.nessus.org/u?ad31d943, http://www.nessus.org/u?06b18299