OwnCord/docs/security.md

Security Policy

Security guidelines and vulnerability reporting for OwnCord.

Reporting Vulnerabilities

Use GitHub Security Advisories to report vulnerabilities: go to Settings > Security > Advisories and create a new advisory.

Do NOT open public issues for security bugs.

Response Timeline

• Acknowledgment: Within 48 hours
• Critical fixes: Within 7 days
• Non-critical fixes: Included in the next release

Two-Factor Authentication

OwnCord supports TOTP-based 2FA:

• Users enroll via Settings > Account (QR code + backup codes)
• Admins can enforce server-wide 2FA via the require_2fa setting in the admin panel
• require_2fa requires all users to have 2FA enabled and registration to be closed
• Login flow returns requires_2fa: true with a partial_token (10-min TTL, 5-attempt limit)
• Auth challenges are rate-limited to 10 req/min per IP
• TOTP code verification uses constant-time comparison (subtle.ConstantTimeCompare) to prevent timing side-channel attacks

Account Deletion

Users can delete their own account via DELETE /api/v1/auth/account with password confirmation. The last admin account cannot be deleted. After 3 failed password attempts, the endpoint locks out for 15 minutes.

Audit Logging

Security-relevant actions are recorded in the audit_log table with actor, action, target, and detail:

• Auth: user_register, user_login, user_logout, login_blocked_banned, account_deleted
• 2FA: totp_enabled, totp_verified, totp_disabled
• Admin: role_change, user_ban, user_unban, force_logout, setting_change, server_setup
• Content: channel_create, channel_update, channel_delete, message_delete
• Ops: backup_create, backup_delete, backup_restore, ws_connect

Client Security Hardening

The Tauri desktop client implements the following security measures:

Credential Storage

• Credentials are stored in Windows Credential Manager via DPAPI (per-user scope, CRED_PERSIST_ENTERPRISE)
• Plaintext passwords are never returned to the frontend over IPC — only tokens are accessible from JavaScript
• Auto-login uses stored tokens for reconnection, not passwords

Tauri Capabilities (Least Privilege)

• Filesystem write access is scoped to $APPDATA/** and $APPLOG/** only
• DevTools command is gated behind the devtools feature flag (excluded from release builds)
• HTTP fetch is restricted to https:// origins plus http://127.0.0.1:* (the Rust TOFU proxy's loopback tunnel), and denies https://localhost[:*] and https://127.0.0.1[:*] — no legitimate flow reaches loopback over https, so the deny list keeps the renderer from probing other local services
• http:allow-fetch is the only URL-scoped HTTP identifier. tauri-plugin-http validates the URL exactly once, in the fetch command; fetch_send and fetch_read_body operate on an already-validated ResourceId and never consult a scope, so allow/deny blocks on those identifiers are inert and were removed rather than left in place advertising a control that does not exist
• The https://* wildcard cannot be removed today: link previews (embeds.ts) fetch arbitrary user-posted URLs by design, and Tauri scopes per command, not per JS caller. Bounded in TypeScript by isPrivateHost/isBlockedForPreview, a 5 s timeout and a 50 KB body cap; the response is regex-scraped for og: tags and never executed
• Regression-guarded by tests/unit/capabilities-scope.test.ts; rationale and the follow-up that would remove the wildcard are in docs/plans/tauri-capability-narrowing.md

TLS and Certificate Pinning (TOFU)

• Self-signed certificates are supported via Trust-On-First-Use (TOFU) pinning
• The WebSocket proxy (ws_proxy) pins the server certificate fingerprint on first connection
• The LiveKit proxy (livekit_proxy) reuses the pinned fingerprint from the WS proxy
• Certificate mismatch triggers a modal requiring user acknowledgment
• Update downloads validate server_url uses https:// and rejects URLs with userinfo

Input Validation

• IPC commands validate host format, string lengths, and character allowlists
• PTT virtual key codes are validated to the Win32 range (1–254)
• LiveKit proxy remote_host is validated against CRLF injection
• API client validates host format before constructing URLs
• File uploads enforce a MIME type allowlist (images, video, audio, PDF, text)
• Error messages from server responses are capped at 200 characters
• Notification titles are sanitized (control chars stripped, length capped)

XSS Prevention

• All user-generated content is rendered via textContent/setText — never innerHTML
• The single innerHTML usage (SVG icons) operates on compile-time constants with a runtime guard
• URLs are validated via isSafeUrl (rejects javascript:, data:, vbscript:)
• YouTube embeds use sandbox attribute on iframes
• image/svg+xml is excluded from safe MIME types for data URIs
• Tenor GIF URLs are validated against trusted CDN origins
• Linkified URLs strip trailing punctuation to prevent misleading destinations

Search and Rate Limiting

• Client-side search requests are rate-limited (500ms minimum interval + 300ms debounce)

Known Limitations

• Server auto-updates depend on a dedicated pinned minisign/Ed25519 server release key in Server/updater/server_update_public_key.txt and a signed release manifest that binds the shipped binary hash to the release version; Windows Authenticode/SmartScreen code signing is still separate work
• The Tenor API key is hardcoded (Google's public anonymous key) — consider build-time injection for production
• CSP connect-src allows https: to any host (necessary for self-hosted server URLs not known at build time). Because of this, narrowing the Tauri http:allow-fetch scope alone would not bound exfiltration from a compromised renderer — the webview's own fetch reaches the same hosts without going through the plugin. Closing that requires narrowing connect-src and moving the link-preview fetch into Rust in the same change

Security Hardening Checklist for Operators

• Enable TLS (self-signed is the default; custom certs recommended for production)
• Keep invite-only registration enabled (default)
• Set a strong admin password
• Configure rate limits (defaults are sensible but review for your use case)
• Run regular backups via the admin panel
• Keep the server updated (admin panel shows available updates)
• Firewall: only expose port 8443 (HTTPS) and 7880 (LiveKit WebSocket for voice/video)
• Enable server-wide 2FA requirement once all users have enrolled
• Set admin_allowed_cidrs to restrict admin panel access to trusted networks