How to remediate – Junos Space WebUI Default Credentials

1. Introduction

The Junos Space WebUI Default Credentials vulnerability involves the use of default credentials for the ‘super’ user account on systems running Junos Space. This poses a security risk as it allows unauthenticated attackers to gain administrative access to the web interface, potentially compromising the entire system. Confidentiality, integrity and availability may be impacted if an attacker gains control.

2. Technical Explanation

The vulnerability stems from the Junos Space WebUI being shipped with a default password for the ‘super’ user account. An attacker can exploit this by attempting to log in using these known credentials, bypassing normal authentication procedures. This is a common misconfiguration that allows remote access without valid authorization.

• Root cause: The Junos Space WebUI interface uses default credentials for the ‘super’ user account.
• Exploit mechanism: An attacker attempts to log in with the default username (‘super’) and password. If successful, they gain administrative access. For example, an attacker could use a simple script or web browser to attempt login from a remote location.
• Scope: Junos Space WebUI is affected.

3. Detection and Assessment

To determine if your system is vulnerable, you can check the current configuration of the ‘super’ user account. A thorough assessment involves attempting to log in with default credentials.

• Quick checks: Use the Junos Space WebUI interface to view the user account details and verify that the ‘super’ user has a default password set.
• Scanning: Nessus plugin ID 139482 can be used as an example to identify this vulnerability.
• Logs and evidence: Check system logs for failed login attempts with the ‘super’ user account, which may indicate scanning activity.

# No command available for direct detection - check via WebUI

4. Solution / Remediation Steps

The solution is to secure the ‘super’ user account with a strong password. Follow these steps to remediate the issue.

4.1 Preparation

• Dependencies: Access to the Junos Space WebUI with administrative privileges is required. Rollback can be achieved by restoring the previous backup if issues occur.
• Change window needs may apply depending on your organization’s policies. Approval from a system administrator may be needed.

4.2 Implementation

1. Step 1: Log in to the Junos Space WebUI as an administrator.
2. Step 2: Navigate to ‘Administration’ > ‘Users’.
3. Step 3: Select the ‘super’ user account.
4. Step 4: Change the password for the ‘super’ user account to a strong, unique password.
5. Step 5: Save the changes.

4.3 Config or Code Example

Before

# Default password set for 'super' user account

After

# Strong, unique password set for 'super' user account

4.4 Security Practices Relevant to This Vulnerability

Several security practices can help prevent this type of vulnerability. Least privilege reduces the impact if an account is compromised. Safe defaults ensure systems are not shipped with easily guessable credentials.

• Practice 1: Implement least privilege by granting users only the necessary permissions to perform their tasks.
• Practice 2: Enforce strong password policies and regular password changes.

4.5 Automation (Optional)

No automation is available for this vulnerability due to its configuration-based nature.

5. Verification / Validation

• Post-fix check: Attempt to log in to the Junos Space WebUI using the ‘super’ username and the *old* default password. The login attempt should fail.
• Re-test: Repeat the steps from section 3 (Detection and Assessment) – the quick check should no longer identify a default password on the super user account.
• Smoke test: Verify that you can log in with the new password and access key system features, such as device monitoring or reporting.
• Monitoring: Monitor logs for failed login attempts to detect potential brute-force attacks targeting the ‘super’ user account.

# Attempt login with default credentials - should fail

6. Preventive Measures and Monitoring

Update security baselines to include a check for strong passwords on critical accounts. Implement regular configuration reviews as part of your patch process.

• Baselines: Update your security baseline or policy to require strong passwords for all administrative accounts, including the Junos Space ‘super’ user.
• Pipelines: Include checks in CI/CD pipelines to scan configurations for default credentials and other security misconfigurations.
• Asset and patch process: Implement a regular configuration review cycle (e.g., quarterly) to identify and remediate potential vulnerabilities like this one.

7. Risks, Side Effects, and Roll Back

Changing the password may temporarily disrupt access if the new password is forgotten or lost. Ensure you have documented the new password securely. If issues arise, restore from a previous backup.

• Risk or side effect 1: Loss of access if the new password is forgotten. Mitigation: Document the new password in a secure location and provide recovery procedures.
• Roll back: Restore Junos Space configuration from a recent backup to revert to the previous state.

8. References and Resources

Refer to Juniper’s official documentation for detailed information on securing Junos Space WebUI.

• Vendor advisory or bulletin: https://kb.juniper.net/InfoCenter/index?page=content&id=KB26220
• NVD or CVE entry: No specific CVE is associated with this vulnerability, as it’s a misconfiguration issue.
• Product or platform documentation relevant to the fix: https://www.juniper.net/documentation/en_US/space/topics/concept/security-best-practices.html