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The vulnerability in the AWS Advanced Go Wrapper for Aurora PostgreSQL stems from improper access control mechanisms. A low-privilege database user, authenticated to a PostgreSQL instance, can craft a specific function or manipulate existing functions. Due to a flaw in the wrapper’s permission handling, this user-defined function can be executed in a context that inherits the elevated permissions of the RDS `rds_superuser` role. This bypasses the intended security model, allowing the attacker to perform administrative actions on the database, such as creating new users, modifying schemas, or accessing sensitive data, effectively escalating their privileges from a standard user to a superuser level within the RDS environment.
Platform: Amazon Aurora PostgreSQL
Version: < 2025-10-17
Vulnerability: Privilege Escalation
Severity: High
date: 2025-11-10
Prediction: Patch Available
What Undercode Say:
git clone https://github.com/aws/aws-advanced-go-wrapper cd aws-advanced-go-wrapper git checkout tags/v1.1.1
CREATE OR REPLACE FUNCTION exploit_func() RETURNS void AS $$ BEGIN EXECUTE 'ALTER ROLE low_priv_user CREATEDB'; END; $$ LANGUAGE plpgsql; SECURITY DEFINER;
How Exploit:
Authenticated user creates a SECURITY DEFINER function. The wrapper incorrectly elevates its execution. Function runs with rds_superuser privileges. Attacker gains full database control.
Protection from this CVE
Upgrade to version 2025-10-17. Apply the AWS-provided patch immediately. Review and audit all custom database functions. Minimize user privileges following the principle of least privilege.
Impact:
Full database compromise. Unauthorized data access and modification. Bypass of all database security controls. Potential for further network lateral movement.
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Sources:
Reported By: github.com
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