How to remediate – Syncrify Detection

1. Introduction

Syncrify Detection indicates the presence of Syncrify, a web-based incremental backup application running on a remote host. This matters to businesses as any web application is potentially exposed to attack. Systems usually affected are servers hosting internal applications and data backups. A successful exploit could lead to unauthorised access to backed up data, compromising confidentiality, integrity, and availability.

2. Technical Explanation

Syncrify is a web application that allows users to manage backup jobs. The vulnerability lies in the fact it’s running a web-based service which may be exposed to external networks. Exploitation typically involves identifying the Syncrify installation, then attempting to exploit known vulnerabilities within the web application itself or its underlying components. There are no publicly assigned CVEs currently associated with this detection alone; however, specific versions of Syncrify may have documented vulnerabilities.

• Root cause: The core issue is running a potentially vulnerable web application accessible from a network.
• Exploit mechanism: An attacker could attempt to exploit common web application flaws like cross-site scripting (XSS), SQL injection, or authentication bypasses against the Syncrify interface. For example, they might try injecting malicious JavaScript code into a form field.
• Scope: Affected platforms are servers running Syncrify on Windows and Linux operating systems. Specific versions need to be assessed individually for known flaws.

3. Detection and Assessment

Confirming the presence of Syncrify is the first step in assessing risk. A quick check can identify if the application is responding, while a thorough method involves identifying the version number.

• Quick checks: Use curl -I http://{target_ip} or browse to the target IP address in a web browser to see if the Syncrify login page appears.
• Scanning: Nessus plugin ID 168794 can detect Syncrify installations, but results should be verified manually.
• Logs and evidence: Check web server logs for requests containing “Syncrify” or paths associated with the application’s interface (e.g., /Syncrify/).

curl -I http://{target_ip}

4. Solution / Remediation Steps

The primary solution is to assess and secure the Syncrify installation, or remove it if no longer needed.

4.1 Preparation

• Services: No services need to be stopped directly, but consider scheduling this during off-peak hours.
• Dependencies: Ensure you have access to Syncrify documentation and support resources. Roll back involves restoring from the pre-change backup if issues occur.
• Change window: A standard change window is recommended, with approval from IT management.

4.2 Implementation

1. Step 1: Check the Syncrify website for the latest version and security updates at http://web.synametrics.com/Syncrify.htm.
2. Step 2: Download and install any available patches or upgrades according to Synametrics’ instructions.
3. Step 3: Review Syncrify’s configuration settings, paying attention to authentication methods and access controls.
4. Step 4: Ensure strong passwords are used for all Syncrify accounts.

4.3 Config or Code Example

Before

#Example insecure default config (this is illustrative)
AllowRemoteAccess = true
DefaultPassword = "password123"

After

#Secure configuration example
AllowRemoteAccess = false
DefaultPassword = "" #Force users to set strong passwords.

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. If a practice does not apply, do not include it.

• Practice 1: Least privilege – restrict access to Syncrify to only authorised users.
• Practice 2: Patch cadence – regularly update Syncrify to the latest version to address known vulnerabilities.

4.5 Automation (Optional)

#Example PowerShell script to check Syncrify version (requires appropriate permissions)
#This is illustrative only - adapt for your environment!
$url = "http://{target_ip}/Syncrify/version.txt" #Replace with the actual URL
try {
    $response = Invoke-WebRequest -Uri $url -UseBasicParsing
    Write-Host "Syncrify Version: $($response.Content)"
} catch {
    Write-Host "Unable to retrieve Syncrify version."
}

5. Verification / Validation

Confirming the fix involves verifying the updated version and testing basic functionality.

• Post-fix check: Run curl -I http://{target_ip} again to confirm Syncrify is still responding, then access the web interface and verify the version number has been updated.
• Re-test: Re-run the Nessus scan (plugin ID 168794) to confirm it no longer reports a vulnerable installation.
• Smoke test: Log in with a valid user account and perform a basic backup or restore operation.
• Monitoring: Monitor web server logs for any unusual activity related to Syncrify, such as failed login attempts or unexpected errors.

curl -I http://{target_ip}

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 your server security baseline to include requirements for web application patching and configuration hardening.
• Asset and patch process: Implement a regular patch management cycle for all servers, including Syncrify.

7. Risks, Side Effects, and Roll Back

• Risk or side effect 1: Upgrading Syncrify may introduce compatibility issues with existing backup jobs. Test thoroughly in a non-production environment first.
• Risk or side effect 2: Incorrect configuration changes could disrupt backup operations. Document all changes carefully.

8. References and Resources

• Vendor advisory or bulletin: http://web.synametrics.com/Syncrify.htm