Security Audit

Skill: Security Audit

Use this skill for security reviews of VoxBento code. Covers OWASP Top 10 and VoxBento-specific threat model.

Threat Model

Security Checklist

A01 — Broken Access Control

• All admin routes use Depends(require_admin).
• require_admin checks user_token (is_admin or event_admin) then admin_token.
• WHIP URL only returned to active interpreter (check_publish_permission in BoothRegistry).
• WS booth:set-active: only coordinator or current active can reassign.
• WS token scope: session_token.event_slug + language_code must match booth_id.
• WS role: session.granted_role used — never data['role'].
• Booth page: granted_role = None → 403 (not just redirect).

A02 — Cryptographic Failures

• JWT_SECRET / SECRET_KEY are not default values in production.
• API_KEY_ENCRYPTION_KEY is not "change-this-encryption-key-in-production" (raises RuntimeError if default).
• API keys stored Fernet-encrypted in DB; never plaintext.
• Passwords hashed with bcrypt (cost factor determined by bcrypt defaults ~12).
• admin_password / jwt_secret not logged.
• HTTPS enforced by reverse proxy (Caddyfile provided).

A03 — Injection

• SQLAlchemy ORM with parameterized queries used throughout — no raw string SQL.
• Event slug and language code validated by regex before DB write (validate_event_slug, validate_language_code).
• Invite token is a 64-char hex string — no user-controlled content in PK.
• Form input passed to template is escaped by Jinja2 autoescaping.

A05 — Security Misconfiguration

• debug: bool = True in default settings — must be False in production.
• BOOTH_ACCESS_TOKEN unset = no token guard on API; set it in production if API is public.
• ADMIN_PASSWORD must be set; empty string disables admin login (see portal/routers/auth.py).
• database_url default is SQLite — use PostgreSQL in production.
• SECRET_KEY: str = 'change-me' — must be overridden.

A07 — Identification and Authentication Failures

• No rate limiting on /login or /register (see TD-08 in TECHNICAL_DEBT_REPORT.md).
• user.is_active checked on login — deactivated users cannot log in.
• JWT expiry is enforced (jwt_expiry_seconds default 86400 = 24h).
• Cookie flags: httponly=True, samesite='lax' on all auth cookies.
• No secure=True on cookies in code — must be added for HTTPS deployments or handled by reverse proxy.

A10 — Server-Side Request Forgery (SSRF)

• _check_mediamtx() and _ensure_mediamtx_path() use settings.mediamtx_api_base — hardcoded from config, not user input.
• Jitsi URL construction: _make_jitsi_url(base_url, room) — base_url is from settings; room is from DB (admin-entered, not end-user).
• No user-controlled URLs are fetched by the server.

Open Redirect Audit

All redirects in portal/routers/ must use safe_redirect(url):

def safe_redirect(url: str, status_code: int) -> RedirectResponse:
    url = url.replace('', '').strip()
    parsed = urlparse(url)
    if url and not parsed.netloc and not parsed.scheme and url.startswith('/'):
        return RedirectResponse(url=url, status_code=status_code)
    return RedirectResponse(url='/', status_code=status_code)

Check next_url / next parameter usage:

grep -rn "next_url\|next=" portal/routers/

Ensure all uses pass through safe_redirect.

Cookie Security Flags

Production hardening: ensure TLS termination at Caddy/nginx level; add Strict-Transport-Security header.

Prompt Injection Detection

VoxBento does not directly pass user input to LLM APIs. Transcription providers receive audio (PCM bytes), not text, from the server. There is no LLM chain in the current implementation.

Security Quick Checks

# Check for raw redirects (should be none)
grep -rn "RedirectResponse(url=" portal/routers/ | grep -v safe_redirect

# Check for debug=True in production settings
grep -n "debug" portal/config.py

# Check JWT secret default
grep -n "change-me\|secret_key" portal/config.py

# Check no inline scripts in templates
grep -rn "<script>" templates/