1. Introduction
HP SiteScope SSLv3 Padding Oracle On Downgraded Legacy Encrypt… is an information disclosure vulnerability affecting web applications running HP SiteScope. This allows a man-in-the-middle attacker to decrypt sensitive data transmitted over SSL 3.0 connections, potentially compromising confidentiality. Systems running vulnerable versions of HP SiteScope are at risk. Impact on confidentiality is likely if attackers can intercept and decrypt traffic.
2. Technical Explanation
The vulnerability (CVE-2014-3566) arises from the way SSL 3.0 handles padding bytes during decryption with block ciphers in CBC mode. An attacker forcing repeated connections can attempt to decrypt individual bytes of ciphertext with approximately 256 attempts each. This is known as a POODLE attack.
- Root cause: The HP SiteScope version uses the SSL 3.0 protocol, which is susceptible to padding oracle attacks due to its weak message authentication code (MAC) and handling of padding bytes.
- Exploit mechanism: An attacker intercepts an encrypted connection between a client and server running vulnerable HP SiteScope. They then manipulate the traffic to force the server to repeatedly send the same data over newly created SSL 3.0 connections, allowing them to decrypt selected bytes of ciphertext through trial-and-error.
- Scope: Affected versions of HP SiteScope that support SSL 3.0 are in scope.
3. Detection and Assessment
- Quick checks: Check the HP SiteScope configuration to determine if SSL 3.0 is enabled. This may be found within the server settings or security configurations of the application.
- Scanning: Nessus plugins 70574 and 4f254c1b can detect this vulnerability. These are examples only, and results should be verified.
- Logs and evidence: Examine HP SiteScope logs for SSL connection attempts using SSL 3.0. Look for entries indicating the use of older protocols during connection negotiation.
# Example command placeholder:
# No specific command available to directly check, review configuration files.
4. Solution / Remediation Steps
Follow these steps to fix the issue.
4.1 Preparation
- Ensure you have access to vendor support documentation (KM01227923) and understand the impact of disabling SSLv3. A roll back plan is to restore the backed-up configuration files.
- A change window may be required depending on your environment. Approval from a security team lead may also be needed.
4.2 Implementation
- Step 1: Refer to vendor support document KM01227923 for detailed instructions on disabling SSLv3 in HP SiteScope.
- Step 2: Apply the recommended configuration changes within the HP SiteScope settings. This typically involves modifying server security parameters or protocol configurations.
- Step 3: Restart the HP SiteScope service to apply the new configuration.
4.3 Config or Code Example
Before
#Example - SSLv3 enabled (configuration varies by version)
ssl.enabledProtocols = TLSv1,TLSv1.1,TLSv1.2,SSLv3
After
#Example - SSLv3 disabled (configuration varies by version)
ssl.enabledProtocols = TLSv1,TLSv1.1,TLSv1.2
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: Patch management – Regularly update HP SiteScope to the latest version to benefit from security fixes and protocol improvements.
- Practice 2: Secure Defaults – Configure systems with secure protocols only (TLSv1.2 or higher) by default, disabling older, vulnerable protocols like SSLv3.
4.5 Automation (Optional)
# No automation script available due to configuration variability.
5. Verification / Validation
Confirm the fix worked using these steps.
- Post-fix check: Verify that SSL 3.0 is no longer enabled in the HP SiteScope configuration. Check server settings or security configurations to confirm TLSv1.2 (or higher) is the only supported protocol.
- Re-test: Re-run Nessus plugins 70574 and 4f254c1b; they should no longer report the vulnerability.
- Monitoring: Monitor HP SiteScope logs for any SSL connection attempts using older protocols, which would indicate a regression.
# Post-fix command and expected output
# Example - Check configuration file (output varies by version)
# grep "ssl.enabledProtocols" /path/to/hp-sitescope.conf
# Expected Output: ssl.enabledProtocols = TLSv1,TLSv1.1,TLSv1.2
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 enforce the use of TLSv1.2 or higher for all systems and applications.
- Pipelines: Implement automated checks in CI/CD pipelines to ensure that new deployments do not enable SSL 3.0 or other vulnerable protocols.
- Asset and patch process: Establish a regular patch review cycle for HP SiteScope, ensuring timely application of security updates.
7. Risks, Side Effects, and Roll Back
- Risk or side effect 1: Disabling SSLv3 may cause compatibility issues with older clients that do not support TLS. Mitigate by ensuring all clients are updated to support modern protocols.
- Roll back: Restore the backed-up HP SiteScope configuration files. Restart the service to revert to the previous state.
8. References and Resources
- Vendor advisory or bulletin: https://support.microfocus.com/kb/doc.php?id=KM01227923
- NVD or CVE entry: Updated on December 27, 2025