Integrity Failures in Adonisjs with Basic Auth

When Adonisjs is configured to use HTTP Basic Authentication without additional integrity protections, the protocol’s lack of built-in request signing or replay defenses can expose endpoints to integrity failures. In this context, integrity refers to the risk that an attacker can alter an in-flight request—such as a user ID, role flag, or permission token—without detection. Because Basic Auth transmits a base64-encoded username:password pair on each request (only obfuscated, not encrypted), an attacker who can observe or intercept the traffic may attempt to modify the Authorization header if other controls are missing.

Adonisjs applications that rely solely on Basic Auth for authentication but do not enforce HTTPS everywhere can allow on-path attackers to downgrade or tamper with requests. For example, an authenticated request to PATCH /users/123 carrying Authorization: Basic dXNlcjoxMjM= could be modified to change the user ID to 124 if the server does not re-validate authorization for the target resource. This becomes an integrity issue because the server may process the request as intended for user 123, but actually apply changes to user 124, potentially escalating impact when combined with insecure direct object references (BOLA/IDOR).

Integrity failures in this stack are often revealed by the combination of unauthenticated scanning and spec-driven analysis. middleBrick’s OpenAPI/Swagger analysis (supporting 2.0, 3.0, and 3.1 with full $ref resolution) can detect missing security schemes or inconsistent usage of security requirements across paths. When Basic Auth is declared but not uniformly applied, or when the spec describes authentication at the global level but endpoints omit it, the scanner can identify gaps that enable tampering. Runtime checks then validate whether authenticated requests can be leveraged to modify identifiers or elevate privilege, mapping findings to frameworks such as OWASP API Top 10 (2023) API5:5 — Broken Function Level Authorization and relevant PCI-DSS controls around integrity.

Consider an Adonisjs route defined with a group that applies basicAuth middleware:

import Route from '@ioc:Adonis/Core/Route'
import BasicAuth from '@ioc:Adonis/Addons/basic-auth'

Route.group(() => {
  Route.get('/users/:id', async ({ request, response }) => {
    const userId = request.param('id')
    // Integrity risk: userId is taken directly from the URL without authorization checks
    response.send({ userId })
  }).middleware([BasicAuth.handle])
})

If the handler does not verify that the authenticated user is authorized to view or modify the provided :id, an attacker can alter the URL path to access or manipulate other users’ data. middleBrick tests such scenarios by probing endpoints with modified identifiers in both authenticated and unauthenticated contexts, looking for BOLA/IDOR indicators that integrity is not enforced. The scanner also inspects whether the API spec documents these endpoints correctly, ensuring security requirements are bound to each relevant operation rather than being an afterthought.

Additionally, integrity concerns extend to how Adonisjs applications consume and process data. Unsafe Consumption patterns—such as accepting unvalidated query parameters or body fields that influence database queries—can allow an attacker to inject or modify values that affect application logic. For example, if an endpoint accepts both an ID in the URL and a JSON body that includes a role or permission flag, and the server trusts the body without re-checking scope, the integrity of authorization decisions may be compromised. middleBrick’s checks for Property Authorization and Input Validation highlight these risks by correlating spec definitions with runtime behavior, ensuring that integrity controls are applied consistently across the unauthenticated attack surface.

To address integrity failures when using Basic Auth in Adonisjs, you must combine transport security, strict identity validation, and explicit authorization checks. The following steps and code examples assume you are using the @ioc:Adonis/Addons/basic-auth package and Adonisjs v5 or later.

1) Enforce HTTPS in production to prevent on-path tampering. Use middleware that rejects HTTP requests or redirects them to HTTPS. This protects the base64-encoded credentials and any other request data from being observable or alterable in cleartext.

2) Never trust route or query parameters for authorization decisions. Always resolve the authenticated identity from the request context and re-check permissions against the target resource. Here is a secure pattern:

import Route from '@ioc:Adonis/Core/Route'
import BasicAuth from '@ioc:Adonis/Addons/basic-auth'

Route.group(() => {
  Route.get('/users/:id', async ({ request, response, auth }) => {
    const { id } = request.params()
    // Ensure the user is authenticated via Basic Auth
    const user = await auth.authenticate()
    // Integrity check: ensure the authenticated user is allowed to view this resource
    if (!user.canViewProfile(id)) {
      return response.status(403).send({ error: 'Forbidden' })
    }
    response.send({ userId: id, username: user.username })
  }).middleware([BasicAuth.handle])
})

3) Define a granular authorization method on your User model that validates scope against the requested identifier:

// In app/Models/User.ts
import { DateTime } from 'luxon'
import { column } from '@ioc:Adonis/Lucid/Orm'

export default class User extends BaseModel {
  @column()
  public username: string

  @column()
  public role: string

  public canViewProfile(targetId: string): boolean {
    // Example policy: users can only view their own profile unless they are admins
    return this.id === targetId || this.role === 'admin'
  }
}

4) Apply global security requirements in your OpenAPI spec (3.0 shown) and ensure each path explicitly references the security scheme. This supports spec-driven scanning and reduces the chance of inconsistent application of Basic Auth:

openapi: 3.0.3
info:
  title: Example API
  version: '1.0'
paths:
  /users/{id}:
    get:
      summary: Get user profile
      security:
        - basicAuth: []
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: OK
components:
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic

5) For endpoints that accept mutable data, validate and sanitize all inputs before using them in queries or business logic. Reject unexpected fields and enforce strict schemas to prevent attackers from injecting privilege-related values through the request body.

By combining HTTPS, explicit re-authorization per request, model-level policy methods, and accurate OpenAPI security definitions, you reduce the risk of integrity failures when Basic Auth is used. Tools like middleBrick can validate these patterns by scanning your endpoints and comparing runtime findings against your spec, highlighting where security requirements are missing or misapplied.