Man In The Middle in Feathersjs with Cockroachdb

In a Feathersjs service that connects to Cockroachdb, a Man In The Middle (MitM) risk arises when communication between the Feathersjs application and the Cockroachdb cluster is not enforced to use encrypted transport. Feathersjs typically exposes a REST or Socket.io interface; if the server connects to Cockroachdb via a connection string or ORM configuration that does not mandate TLS, credentials, queries, and result sets can traverse the network unencrypted. An attacker who can position themselves on the network path (for example, on the same VPC, subnet, or via a compromised intermediate hop) can observe or alter these statements. This is particularly relevant in cloud or containerized environments where traffic between application pods and Cockroachdb may traverse shared infrastructure without default encryption.

Feathersjs does not inherently encrypt outbound database connections; encryption depends on the underlying driver and the connection parameters supplied to Cockroachdb. If the connection string omits ssl=true or uses a non-verified certificate (e.g., ?sslcert=...&sslkey=...&sslrootcert=... without proper validation), the channel remains vulnerable. Additionally, Feathersjs hooks that dynamically construct queries based on user input can inadvertently expose sensitive data in logs or error messages when intercepted. For example, an attacker capable of MitM on the wire might capture authentication tokens passed in headers or query parameters that are then forwarded as part of the database request, enabling credential replay or privilege escalation. Because Cockroachdb supports secure connections with certificate verification, omitting these options in a Feathersjs integration effectively disables a critical layer of confidentiality and integrity.

The interplay of Feathersjs service hooks and Cockroachdb’s wire protocol means that unencrypted connections can expose not only data at rest but also data in transit between the service and the cluster. This is compounded when services use insecure load balancers or when TLS termination occurs at a proxy without strict certificate validation in the application layer. The risk is not limited to external networks; internal east-west traffic within a Kubernetes cluster can also be susceptible if network policies do not enforce encryption. Therefore, ensuring end-to-end encryption and strict hostname verification in the Cockroachdb client configuration is essential to prevent MitM attacks in this specific stack.

To remediate MitM risks when Feathersjs communicates with Cockroachdb, enforce TLS for all database connections and validate certificates explicitly. Configure the Feathersjs service hooks to pass secure connection options to the Cockroachdb driver. Below are concrete, working examples that demonstrate how to establish encrypted connections with certificate-based authentication in a Feathersjs service using feathers-sequelize or a raw Sequelize instance connected to Cockroachdb.

Example 1: Secure Sequelize connection for Cockroachdb in Feathersjs

const { Sequelize } = require('sequelize');
const feathers = require('@feathersjs/feathers');
const sequelize = new Sequelize({
  dialect: 'postgres',
  host: 'your-cockroachdb-host.example.com',
  port: 26257,
  database: 'yourdb',
  username: 'youruser',
  password: 'yourpassword',
  protocol: 'postgres',
  dialectOptions: {
    ssl: {
      require: true,
      rejectUnauthorized: true,
      ca: fs.readFileSync('/path/to/ca.crt').toString(),
      key: fs.readFileSync('/path/to/client.key').toString(),
      cert: fs.readFileSync('/path/to/client.crt').toString()
    }
  },
  logging: false
});

const app = feathers();
app.configure(rest());
app.configure(socketio());

// Example service registration using the secure sequelize instance
app.use('/records', new SequelizeService({
  Model: sequelize.define('record', {
    // your model definition
    name: { type: DataTypes.STRING, allowNull: false }
  }, { sequelize }),
  paginate: { default: 10, max: 50 }
}));

Example 2: Environment-driven secure configuration

Use environment variables to control SSL enforcement and certificate paths, ensuring that production deployments mandate encryption while development can use non-encrypted local clusters if needed. This approach keeps sensitive keys out of source code and allows runtime configuration without changing Feathersjs service files.

const sslConfig = process.env.NODE_ENV === 'production' ? {
  require: true,
  rejectUnauthorized: true,
  ca: fs.readFileSync(process.env.COCKRACKDB_CA_PATH).toString()
} : false;

const sequelize = new Sequelize({
  dialect: 'postgres',
  host: process.env.COCKRDB_HOST,
  port: 26257,
  database: process.env.COCKRDB_DB,
  username: process.env.COCKRDB_USER,
  password: process.env.COCKRDB_PASS,
  dialectOptions: {
    ssl: sslConfig
  }
});

Additional hardening steps

• Always set rejectUnauthorized: true in production to prevent connections to servers with invalid or self-signed certificates not anchored to your trusted CA.
• Ensure that the Cockroachdb cluster is configured to require TLS for all client connections, matching the certificate rotation policies used by Feathersjs.
• Validate that the ORM or query builder used by Feathersjs does not log raw parameterized queries containing sensitive values in plain text, which could be exposed during transport if logging is not properly secured.