Challenges
The client’s primary concern was the resilience of its consumer-facing life insurance applications against external attack, while preserving uninterrupted access for live customers. Testing was carried out in a black-box configuration against production endpoints, without any privileged knowledge of the underlying stack and without disruptive techniques.
CyberGlobal UK‘s team examined transport-layer security, HTTP response configuration, embedded content handling, and authentication flows across three customer-facing applications. No critical or high-severity issues were identified, but the assessment surfaced a cluster of medium and low-risk weaknesses that increased the attack surface:
- Secure client-initiated TLS renegotiation not enabled (medium)
- Support for deprecated TLS 1.0 and TLS 1.1 protocol versions
- Cipher Block Chaining (CBC) cipher suites enabling Lucky13-class padding-oracle attacks
- SSL/TLS BEAST-class weakness in older protocol versions
- HTTP-to-HTTPS redirection is in place, but without strict HSTS enforcement
- Missing or misconfigured HTTP security headers (CSP, X-Content-Type-Options, frame-ancestors)
- Insecure inline frame (iframe) usage without sandboxing
Solutions
Following the testing phase, CyberGlobal UK delivered a prioritised remediation plan, structured to slot into the client’s existing release cadence:
- Transport-Layer Hardening: TLS 1.0 and 1.1 disabled, TLS 1.2 enforced as the minimum, and 1.3 preferred. CBC cipher suites were removed in favour of GCM and ChaCha20, and secure client-initiated renegotiation was enabled.
- HSTS Enforcement: HTTP Strict Transport Security deployed with an appropriate max-age and includeSubDomains, eliminating the initial-connection window.
- Security Headers: A consistent baseline of HTTP security headers rolled out across the consumer-facing applications, including a tightened Content Security Policy and frame-ancestors restrictions.
- Frame Security: Inline frame usage is restricted with the sandbox attribute and limited to trusted origins only.
- Information Disclosure Cleanup: Server banners, verbose error responses, and unnecessary diagnostic endpoints removed or scoped to internal networks.
- Continuous Assurance: A recurring assessment cadence is agreed upon so future releases and acquired products are retested against the same baseline.
Results
Every medium and low-severity finding was addressed within the agreed remediation cycle. Independent retesting confirmed that the consumer-facing life insurance applications were aligned with modern transport-layer baselines, that HTTP responses enforced a consistent security policy, and that the residual risk to policyholder data through the in-scope channels was low.
Key lessons learned include the following:
- Even mature, well-architected platforms accumulate cryptographic debt over time, so protocol-level reviews must be repeated regularly.
- HTTP-to-HTTPS redirection alone is not a substitute for HSTS; both controls are needed to fully close the initial-connection window.
- HTTP security headers remain one of the highest-return, lowest-effort controls available to web application owners.
- Embedded content controls deserve the same scrutiny as first-party application code, particularly in regulated consumer journeys.
- Recurring black-box assessments aligned to NIST and OWASP provide repeatable, evidence-backed assurance for risk and audit stakeholders.
By engaging CyberGlobal UK regularly, the client confirmed the resilience of its consumer-facing life insurance channels and established a clear baseline against which future releases can be measured.