Supabase RLS Security Audit: Fixing SECURITY DEFINER Vulnerabilities
The article discusses a security audit conducted on Supabase, a multi-tenant database setup, which uncovered critical vulnerabilities in Row Level Security (RLS) policies, SECURITY DEFINER function implementations, and mutable search_path configurations.
Why it matters
Securing multi-tenant database setups is crucial to prevent unauthorized data access and privilege escalation risks.
Key Points
- 1Discovered privilege escalation risks in Supabase multi-tenant setup
- 2Found gaps in RLS policies, unsafe SECURITY DEFINER functions, and mutable search_path configurations
- 3Migrated functions to SECURITY INVOKER, hardened RLS policies, and implemented automated security checks
Details
The article describes a comprehensive security audit conducted by the Load Bearing Empire team on their three production databases using Supabase, a multi-tenant database platform. The audit uncovered critical vulnerabilities, including gaps in Row Level Security (RLS) policies, unsafe SECURITY DEFINER function implementations, and mutable search_path configurations that could allow unauthorized data access. The team addressed these issues by migrating functions to SECURITY INVOKER, hardening their RLS policies, and implementing automated security checks using pg_cron. The article provides code examples from their real infrastructure powering various SaaS products, including real estate wholesaling, demolition, valet, and structural engineering.
No comments yet
Be the first to comment