Frozen Privilege: Remote Code Execution in Snowflake-Managed PostgreSQL
Vulnerability: Non-superusers can chain PostgreSQL features in Snowflake to achieve OS-level RCE, bypassing mitigations and audit trails.
Deep Analysis and Expert Commentary
The attack path begins with a non-superuser role possessing CREATEROLE, leveraging PostgreSQL’s designed behaviors to escalate privileges to OS-level command execution. This bypasses Snowflake’s published defenses without disabling them, operating in a layer invisible to customers. The impact extends beyond data compromise to include tampering with database files and evading detection. Snowflake’s rapid remediation underscores the importance of provider-side hardening, but customers must still enforce least-privilege role design. The broader lesson is that managed services shift operational burden but not risk ownership, as hidden feature interactions can create unforeseen attack vectors.
Action Items
- Audit and scope PostgreSQL roles with least privilege, especially CREATEROLE permissions.
- Monitor for unusual activity in managed databases, even if logs appear clean.
- Engage with providers to understand their hardening measures and shared responsibility boundaries.
Original Article Brief Intro
Varonis Blog · 2026-10-17 · Vulnerability: Non-superusers can chain PostgreSQL features in Snowflake to achieve OS-level RCE, bypassing mitigations and audit trails.
Related Terms and Notes
Techniques / TTPs
- PostgreSQL — An open-source relational database system often used in cloud-managed services.
- Privilege Escalation
- RCE — Remote Code Execution allows attackers to execute arbitrary commands on a target system.
Context Notes
- Cloud Security
- Cloud Vulnerability
- PostgreSQL
- Remote Code Execution
- Snowflake