1.5 KiB
Sentinel's Journal
2026-02-07 - Telegram Bot Authorization Bypass
Vulnerability: The Telegram Deployment Bot (scripts/telegram_deploy_bot.py) contained a "Fail Open" vulnerability where omitting the TELEGRAM_ALLOWED_USER_IDS environment variable resulted in granting access to all Telegram users instead of none.
Learning: Security controls must default to deny (Fail Closed). Implicitly allowing access when configuration is missing creates silent vulnerabilities that are hard to detect until exploited.
Prevention: Ensure all authorization checks explicitly return False or throw an exception if the access control list is empty or undefined. Never default to True in security-critical paths.
2026-02-13 - [Documentation] Cloudflare Nameservers and Domain Unification
- Updated Cloudflare nameservers to daisy.ns.cloudflare.com and rocco.ns.cloudflare.com.
- Unified domain name to lengkundee01.org across CNAME and PWA documentation.
2026-02-14 - Information Leak via Error Messages
Vulnerability: The web dashboard (scripts/web_dashboard.py) exposed raw exception messages directly to users in 500 responses. This could leak internal details like file paths or stack traces.
Learning: Never return raw exception strings to users. Generic error messages ("Internal Server Error") should be shown to users while detailed errors are logged securely on the server.
Prevention: Catch all exceptions at the route level, log the details to stderr/logging, and return a sanitized, generic error message to the client.