Ubuntu Security Notice USN-6296-1

Ubuntu Security Notice 6296-1 - It was discovered that PostgreSQL incorrectly handled certain extension script substitutions. An attacker having database-level CREATE privileges can use this issue to execute arbitrary code as the bootstrap superuser. It was discovered that PostgreSQL incorrectly handled the MERGE command. A remote attacker could possibly use this issue to bypass certain UPDATE and SELECT policies. This issue only affected Ubuntu 23.04.

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