A security issue was found in PostgreSQL before version 13.3. Using an UPDATE ... RETURNING on a purpose-crafted partitioned table, an attacker can read arbitrary bytes of server memory. In the default configuration, any authenticated database user can create prerequisite objects and complete this attack at will. A user lacking the CREATE and TEMPORARY privileges on all databases and the CREATE privilege on all schemas typically cannot use this attack at will.
A security issue was found in PostgreSQL before version 13.3. Using an UPDATE ... RETURNING on a purpose-crafted partitioned table, an attacker can read arbitrary bytes of server memory. In the default configuration, any authenticated database user can create prerequisite objects and complete this attack at will. A user lacking the CREATE and TEMPORARY privileges on all databases and the CREATE privilege on all schemas typically cannot use this attack at will.
https://www.postgresql.org/support/security/CVE-2021-32029/ https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=a71cfc56bf6013e3ea1d673acaf73fe7ebbd6bf3
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