Zone Transfer in Feathersjs with Basic Auth

Zone transfer in the context of FeathersJS with Basic Auth refers to an authorization issue (BOLA/IDOR) where one authenticated client can retrieve DNS-like resource records or service configurations that should be isolated per client or per zone. FeathersJS is a framework for real-time web apps; when its services are configured to accept Basic Auth credentials, misconfigured service logic can allow a low-privilege user to request data belonging to another zone or tenant.

Basic Auth sends credentials as an Authorization: Basic base64(username:password) header. If FeathersJS uses that header to perform identity checks but does not enforce tenant or zone scoping at the service or hook level, an attacker can reuse the same credentials to query endpoints that return zone-specific data. For example, a service might resolve req.user from the Basic Auth header and then return all records associated with that user without verifying that the requested record zone matches the user’s allowed zones.

An unauthenticated or partially authenticated scan by middleBrick will flag this as a BOLA/IDOR finding because the endpoint reveals data across logical boundaries. Attack patterns include enumerating other zone identifiers by iterating IDs or filtering on known zone fields. The risk is elevated when FeathersJS hooks do not validate ownership on read operations, and when services expose sensitive configuration or metadata that should be zone-contained.

Consider this vulnerable FeathersJS service without zone checks:

// services/records/records.js — vulnerable example
module.exports = function (app) {
  const { records } = app.get('models');
  return {
    async find(params) {
      const { zone } = params.query;
      // Missing: ensure record.zone matches authenticated user's allowed zones
      return records.find({ query: { zone } });
    }
  };
};

In this example, an attacker supplying valid Basic Auth credentials can change the zone query parameter to access records outside their permitted scope. middleBrick’s parallel checks for BOLA/IDOR, Input Validation, and Property Authorization would highlight this as a high-severity finding because the service does not enforce tenant isolation.

Remediation guidance centers on strict zone-to-user mapping and hook-level validation. Do not rely on client-supplied query parameters alone to enforce boundaries. Combine user identity from the Basic Auth header with server-side policy checks before returning any zone-specific data.

Secure remediation requires two layers: (1) ensure Basic Auth credentials are validated and mapped to a scoped identity, and (2) enforce zone or tenant checks on every data access. Avoid sending credentials in URLs; always use HTTPS to protect the base64-encoded header from eavesdropping.

First, configure FeathersJS authentication to extract identity from Basic Auth and attach a strict user object that includes allowed zones. Then use hooks to verify that any requested zone matches one of the user’s permitted zones.

Example secure setup:

// app.js — authentication and hooks setup
const authentication = require('@feathersjs/authentication');
const local = require('@feathersjs/authentication-local');

app.configure(authentication({
  entity: 'user',
  service: 'users',
  secret: process.env.SECRET,
  strategies: ['local']
}));

app.use('/records', createService({
  Model: RecordsModel,
  paginate: { default: 10, max: 50 }
}));

app.service('records').hooks({
  before: {
    async find(context) {
      const user = context.params.user;
      if (!user || !user.zones) {
        throw new Error('Unauthorized');
      }
      // Ensure the query is scoped to allowed zones
      const allowedZones = user.zones;
      context.params.query.$and = [
        context.params.query.$and || {},
        { zone: { $in: allowedZones } }
      ];
      return context;
    },
    async get(context) {
      const user = context.params.user;
      const record = await context.app.service('records').Model.findById(context.id);
      if (!record) {
        throw new Error('Not found');
      }
      if (!user.zones.includes(record.zone)) {
        throw new Error('Unauthorized');
      }
      context.result = record;
      return context;
    }
  }
});

In this example, the user object must include a zones array populated during login (e.g., from a user record or an external directory). The find hook restricts queries to zones the user is allowed to see; the get hook ensures individual record access respects the same boundary. This prevents zone-scope escalation even when Basic Auth credentials are valid.

Additionally, configure transport security and avoid embedding credentials in requests. middleBrick’s scans for Encryption and Data Exposure will highlight missing HTTPS or excessive data exposure in responses. For automation, use the CLI to validate fixes:

middlebrick scan https://api.example.com

or integrate into CI/CD with the GitHub Action to fail builds if risk scores regress:

- uses: middlebird/middlebrick-action@v1
  with:
    url: https://api.example.com
    threshold: C