Auth Bypass in Django with Cockroachdb

An auth bypass in Django when using CockroachDB can occur when session or user-state handling relies on database queries that are not safely isolated from authentication logic. CockroachDB is PostgreSQL-wire compatible, so Django interacts with it using the PostgreSQL backend. If the project uses session storage in CockroachDB (for example via django.contrib.sessions backed by a CockroachDB table) and the session model is not properly tied to a validated user identity, an attacker may be able to reuse or manipulate session identifiers to impersonate users.

Common root causes include:

• Using the default Django database session engine with CockroachDB and failing to enforce strict session-to-user binding, allowing an attacker to inject a known session key and gain access without proper authentication.
• Custom authentication backends or token verification that incorrectly query CockroachDB without proper row-level security or parameterized queries, potentially enabling IDOR (Insecure Direct Object Reference) or BOLA (Broken Level of Authorization) when object ownership is not verified per request.
• Misconfigured database transactions or isolation levels that allow race conditions where a session created by one user is accepted as valid for another, especially when combined with long-lived session cookies and CockroachDB’s distributed transaction semantics.

These issues map to OWASP API Top 10 controls around authentication and authorization (broken authentication) and can be detected during unauthenticated scans that test session endpoints and user-state handling. For example, an attacker might probe endpoints that rely on session cookies stored in a CockroachDB-backed session table and attempt to substitute another user’s session key to access protected resources.

middleBrick detects such risks by running parallel security checks including Authentication, BOLA/IDOR, and Property Authorization while analyzing OpenAPI specs and runtime behavior. If your API uses CockroachDB as a session store or identity backend, ensure each session is cryptographically tied to a user ID and that every request re-validates ownership rather than trusting client-supplied identifiers alone.

To secure Django with CockroachDB, focus on strict session handling, safe database queries, and explicit ownership checks. The following examples assume you use CockroachDB as a PostgreSQL-compatible backend and follow Django’s standard configuration patterns.

1. Use secure session configuration

Set session engine to cached_db and enforce Secure and HttpOnly flags. In settings.py:

SESSION_ENGINE = 'django.contrib.sessions.backends.cached_db'
SESSION_COOKIE_SECURE = True
SESSION_COOKIE_HTTPONLY = True
SESSION_COOKIE_SAMESITE = 'Lax'

With CockroachDB, cached_db stores sessions in cache first and falls back to the database (CockroachDB) for persistence, reducing direct load while keeping a durable record.

2. Parameterized queries for user and session lookup

Never concatenate identifiers when querying CockroachDB from Django models. Use Django’s ORM parameterization to avoid injection and ensure proper scoping:

from django.contrib.auth import get_user_model
User = get_user_model()

# Safe: ORM enforces parameterized SQL
user = User.objects.filter(username=username).first()

# If using raw SQL for CockroachDB-specific features, use params
def get_user_by_email(email):
    from django.db import connection
    with connection.cursor() as cursor:
        cursor.execute('SELECT id, username FROM auth_user WHERE email = %s', [email])
        row = cursor.fetchone()
        return row

3. Enforce ownership on every request

When endpoints accept identifiers (e.g., profile_id), validate that the requested resource belongs to the authenticated user:

from django.http import HttpResponseForbidden
from .models import UserProfile

def view_profile(request, profile_id):
    # Ensure the profile belongs to the requesting user
    if not UserProfile.objects.filter(id=profile_id, user=request.user).exists():
        return HttpResponseForbidden('Not authorized')
    # Proceed safely
    profile = UserProfile.objects.get(id=profile_id, user=request.user)
    return render(request, 'profile.html', {'profile': profile})

4. Rotate secrets and restrict permissions

Ensure your CockroachDB credentials have minimal required permissions and rotate them regularly. In settings.py, reference credentials via environment variables:

import os
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': os.getenv('COCKROACH_DB'),
        'USER': os.getenv('COCKROACH_USER'),
        'PASSWORD': os.getenv('COCKROACH_PASSWORD'),
        'HOST': os.getenv('COCKROACH_HOST'),
        'PORT': os.getenv('COCKROACH_PORT'),
        'OPTIONS': {
            'sslmode': 'require',
        },
    }
}

middleBrick’s scans can validate these configurations against best practices and highlight missing ownership checks or overly permissive database rules.