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.
2026-02-23 - Web Dashboard Error Leakage
Vulnerability: The web dashboard (scripts/web_dashboard.py) was catching all exceptions and returning the raw exception message to the user, potentially leaking sensitive internal state or file paths.
Learning: Developers often prioritize debugging convenience over security by returning raw errors, which is dangerous in production.
Prevention: Always catch exceptions in web handlers, log the full details server-side (e.g., to stderr), and return a generic "Internal Server Error" message to the client.