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The CVE-2025-XXXX vulnerability in the AWS Advanced Python Wrapper for Aurora PostgreSQL stems from improper access control. A low-privileged database user, authenticated to a PostgreSQL instance, can craft a specific function. Due to a flaw in the wrapper’s connection handling logic, this malicious function can be executed in a context with elevated permissions. This exploitation leverages the wrapper’s internal mechanism for switching user roles, allowing the attacker to assume the privileges of another, higher-privileged RDS user, potentially escalating to the powerful `rds_superuser` role and gaining full control over the database instance.
Platform: AWS Aurora PostgreSQL
Version: < 1.4.0
Vulnerability: Privilege Escalation
Severity: High
date: 2025-11-10
Prediction: Patch 2025-11-20
What Undercode Say:
git clone https://github.com/aws/aws-advanced-python-wrapper.git cd aws-advanced-python-wrapper git checkout v1.3.0
Example malicious function creation CREATE OR REPLACE FUNCTION evil_func() RETURNS void AS $$ BEGIN EXECUTE 'ALTER ROLE low_priv_user WITH rds_superuser'; END; $$ LANGUAGE plpgsql SECURITY DEFINER;
How Exploit:
Authenticate to database.
Create a SECURITY DEFINER function.
Exploit wrapper logic.
Execute with elevated permissions.
Achieve rds_superuser role.
Protection from this CVE
Upgrade to version 1.4.0.
Review all custom functions.
Apply principle of least privilege.
Audit user permissions regularly.
Impact:
Full database compromise.
Bypass of security controls.
Unauthorized data access.
Potential data destruction.
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Sources:
Reported By: github.com
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