Arbitrary Code Execution in PostgreSQL via REINDEX CONCURRENTLY

Executive Summary

This vulnerability in PostgreSQL involves the REINDEX CONCURRENTLY command. It fails to block DROP INDEX operations during index functions, allowing an attacker with object creation privileges to execute arbitrary code as the database's operating system user by triggering a DROP INDEX command through an index expression.

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Detection Guidance

To detect this vulnerability, check your PostgreSQL version using 'psql --version' or 'SELECT version();'. If your version is below 18.7, 17.12, 16.16, 15.20, or 14.25, your system is vulnerable.

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Impact Analysis

An attacker could gain full control over the database server, leading to unauthorized data access, modification, or deletion. This could result in data breaches, system compromise, or disruption of database services.

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Compliance Impact

This vulnerability could lead to unauthorized access or exposure of sensitive data, violating GDPR's data protection requirements and HIPAA's security rules. Organizations may face legal penalties, reputational damage, and loss of compliance certifications.

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Mitigation Strategies

Immediately upgrade PostgreSQL to a patched version (18.7 or later, 17.12 or later, 16.16 or later, 15.20 or later, 14.25 or later). Avoid using REINDEX CONCURRENTLY until patched. Review user permissions to limit object creation privileges.

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