Heartbleed in Hanami with Cockroachdb

Heartbleed (CVE-2014-0160) is a vulnerability in OpenSSL’s TLS heartbeat extension that allows memory disclosure from server or client processes. Hanami is a Ruby web framework that encourages minimal dependencies and explicit configuration, but it does not inherently prevent misuse of underlying transport security. When Hanami applications communicate with CockroachDB, the database client typically uses TLS to protect connections. If an older version of OpenSSL with the Heartbleed bug is used in the environment, an attacker on the network can exploit the TLS heartbeat to leak process memory, which may contain sensitive data such as database credentials, query strings, or session tokens that are present in the Hanami app during connection setup.

In a Hanami app, the database connection is often established via a dedicated library (e.g., pg or an ORM layer) that relies on the system OpenSSL. CockroachDB requires TLS for secure connections, and developers commonly configure TLS certificates and keys in Hanami’s configuration files. If the server or client OpenSSL library is vulnerable, the heartbeat channel can be triggered during the TLS handshake or keep‑alive traffic. Because Hanami applications may embed database credentials or tokens in memory while establishing connections, those secrets can be exposed through the leaked heartbeat responses. The risk is higher in setups where Hanami runs in containers or VMs with shared networking, as scanning tools can easily send malicious heartbeat requests to the TLS endpoint used by CockroachDB.

middleBrick’s unauthenticated scan checks the TLS endpoint for signs of Heartbleed by sending heartbeat requests and inspecting responses for out-of-bounds memory data. In a combined Hanami and CockroachDB deployment, the scan can detect abnormal heartbeat behavior that indicates the OpenSSL library is vulnerable. Since Hanami does not patch OpenSSL, the responsibility falls on the infrastructure team to ensure the operating system or container base image uses a patched OpenSSL version. The scan also highlights whether CockroachDB’s advertised TLS configuration aligns with current best practices, helping teams verify that transport security is properly enforced without relying on framework-level fixes.

Remediation focuses on updating OpenSSL, enforcing strong TLS settings for CockroachDB connections, and hardening the Hanami application’s configuration. Below are concrete steps and code examples for a Hanami app using CockroachDB.

• 1) Update OpenSSL and base image

Ensure the runtime environment uses OpenSSL 1.0.1g or newer. For a Docker-based Hanami app, start from a modern base image:

FROM ruby:3.2-slim-bookworm
# Bookworm includes OpenSSL 3.0, which is not vulnerable to Heartbleed
RUN apt-get update && apt-get install -y curl ca-certificates
WORKDIR /app

• 2) Configure CockroachDB TLS in Hanami

Use the pg gem with explicit SSL parameters. Store certificates securely and reference them via environment variables:

require 'pg'conn = PG.connect(
  host: ENV['COCKROACHDB_HOST'],
  port: ENV.fetch('COCKROACHDB_PORT', '26257'),
  sslmode: 'verify-full',
  sslcert: ENV['COCKROACHDB_CLIENT_CERT'],
  sslkey: ENV['COCKROACHDB_CLIENT_KEY'],
  sslrootcert: ENV['COCKROACHDB_CA_CERT'],
  sslcompression: false
)res = conn.exec_params('SELECT $1::TEXT AS greeting', [ 'Hello from Hanami with CockroachDB' ])
puts res.first['greeting']

• 3) Enforce strong cipher suites and TLS versions

In your Hanami configuration, prefer TLS 1.2 or 1.3 and limit ciphers to strong, non‑export sets. You can set environment variables for the pg gem or rely on OpenSSL configuration files. For example, using environment variables:

ENV['SSL_CERT_FILE'] = '/etc/ssl/certs/ca-certificates.crt'
ENV['SSL_CIPHER_LIST'] = 'TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256'

• 4) Rotate certificates and keys

Regularly rotate CockroachDB client certificates and ensure Hanami reloads them safely. Use tools like cockroach cert to generate short-lived certificates and automate updates via CI/CD. In Hanami, avoid committing certificate material to the repository; instead, inject secrets at runtime through your container orchestrator or secret manager.

• 5) Verify with middleBrick scans

Use the middleBrick CLI to confirm the fix:

middlebrick scan https://your-hanami-app.example.com

Review the findings for TLS configuration and ensure no Heartbleed indicators remain. The dashboard can track changes over time, while the Pro plan’s continuous monitoring can alert you if future scans detect regression.