Two independent PHI-leak hardenings folded together:
1. forgot-password timing oracle
The hit path previously did SELECT + token gen + UPDATE + SMTP send
before responding; the miss path returned after the SELECT. An
attacker could distinguish registered emails by response latency
(SMTP RTT is hundreds of ms). Response is now sent immediately after
Turnstile, with the DB and email work fired-and-forgotten in a
background async block. Hit and miss take identical wall-clock time.
Also hardened req.body.email to tolerate missing/non-string input
instead of throwing 500.
2. logger.file redaction
logger.info/warn/error wrote straight to /app/data/logs/YYYY-MM-DD.log
without going through redact(). Current callers are metadata-only and
safe, but any future caller writing logger.error('boom', req.body)
would silently drop PHI to disk. Route both message and optional data
through redact() — same helper the audit path already uses. Benign
startup messages pass through unchanged; SSN/phone/email/DOB patterns
are tokenised, long note-body-shaped text is truncated.
- Add logger.audit/access calls to auth route (login, login_failed,
login_blocked, register, password_changed, 2fa_backup_code_used,
2fa_backup_codes_regenerated) — these previously only wrote to DB
via raw SQL, bypassing Loki shipper
- Replace logger.info with logger.apiCall in callAI() so every AI call
ships to Loki with model, tokens, cost, duration
- Add device identifier (parsed user agent) to audit and access logs
- Fix TTS voice/model provider mismatch: auto-detect Vertex voices
(Puck, Charon, Kore, etc.) and ElevenLabs voice IDs, override model
to match provider regardless of what model was previously set
- Fix TTS discovery: model IDs saved to tts.voice are detected and
redirected to tts.model (regex for openai-tts, elevenlabs, vertex-tts)
- Fix STT transcription route: add scribe/elevenlabs/transcri to the
isTranscriptionModel regex so ElevenLabs Scribe uses /audio/transcriptions
endpoint instead of chat completions
- Remove OpenObserve/SigNoz code from logger (reverted to Loki-only)
Age parser (src/routes/billing.js):
- Now sums year + month + week + day matches so "4 yr 11 mo"
(59 months) correctly maps to the 5-11y billing bracket instead
of being billed as 1-4y. Added bounds sanity check.
Graceful SIGTERM shutdown (server.js):
- Closes the HTTP listener first, then drains batched audit queues,
then ends the Postgres pool. 9-second hard deadline to beat
Docker's 10-second SIGKILL. Previously an in-flight note save
during a container restart could truncate the write.
Explicit LLM fallback opt-in (src/utils/ai.js):
- The OpenRouter / LiteLLM silent fallback now requires admin
setting `ai.allow_model_fallback = true` (default: false). If
primary fails and fallback is disabled, the error is surfaced
to the caller. Prevents silent spillover from a BAA-covered
primary to a non-covered fallback.
Prompt injection delimiters (src/utils/promptSafe.js):
- Wraps user transcripts, dictations, refine-instructions, and
pasted documents in <UNTRUSTED_*>...</UNTRUSTED_*> tags and
appends an explicit system instruction telling the model to
treat the wrapped content as data rather than commands.
- Applied to soap.js, hpi.js, refine.js. Extend to other AI
routes incrementally.
Cross-tab logout sync (public/js/authFetch.js, auth.js):
- BroadcastChannel('pedscribe-auth') — logout in one tab posts
a message; all sibling tabs clear state and reload, dropping
any PHI-containing UI immediately.
Backup code race-free consumption (src/routes/auth.js):
- tryConsumeBackupCode() now uses a Postgres transaction with
SELECT ... FOR UPDATE so concurrent login attempts using the
same code serialize. First wins, second sees the already-
shortened array.
Optimistic encounter locking (migrations/...add-encounter-version):
- saved_encounters.version INTEGER NOT NULL DEFAULT 1
- POST /api/encounters/saved accepts an expected_version and
rejects with 409 if the row has advanced. Falls back to
last-write-wins if the client doesn't pass one (backward compat).
Audit log batching (src/utils/auditQueue.js):
- Audit / api_log / access_log writes are buffered in memory and
flushed every 1s or every 50 entries via one multi-row INSERT.
Under load this reduces DB pressure by ~50x. On SIGTERM the
shutdown path drains the queue before exiting.
- App-layer AES-256-GCM crypto helper (src/utils/crypto.js)
- Nextcloud tokens encrypted at rest; transparent migration on next use
- Audio backups encrypted at rest (version byte 0x01 envelope); legacy
rows still decrypt as-is until overwritten
- argon2id password hashing via src/utils/passwords.js with bcrypt
fallback; bcrypt hashes rehashed to argon2id on next successful login.
argon2 package is optional — server keeps running with bcrypt only
until npm install adds the native dep
- PHI redactor for audit log details (src/utils/redact.js) — strips SSN,
phone, email, DoB, long IDs; caps at 500 chars; detects note bodies
- DOMPurify (cdnjs, SRI-pinned) replaces custom regex sanitizer in
Learning Hub content rendering
- SRI integrity hashes added for Font Awesome CSS and Chart.js
- Magic-byte file-type verification on document uploads
(src/utils/fileType.js)
- Generic 500 error responses via src/utils/errors.js applied to
nextcloud and audioBackups; full detail still logged server-side
- DATA_ENCRYPTION_KEY env documented in .env.example
Deploy: requires rebuild of the container image to pick up the new
files and `npm install` (adds argon2). Existing users keep working
because bcrypt stays available and crypto helpers pass through
plaintext when the key is not yet set in dev.
Loki logs now include:
- User agent string (browser/device identification)
- Session ID (ties actions to specific login session)
- Status field (success/failure)
New logging:
- encounter_load: logged when user opens a saved encounter (with label)
- copy_to_clipboard: logged when user copies note content (PHI access)
- Client event endpoint: POST /api/logs/client-event (auth required)
Encounter save/delete/load all include the encounter label for
patient identification in audit trail.
HIPAA audit trail now covers: who, what, when, from where, which
device, which session, what patient data, success/failure.
