Memory disclosure in partitioned-table UPDATE ... RETURNING

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.

The PostgreSQL project thanks Tom Lane for reporting this problem.

Version Information

Affected Version Fixed In Fix Published
13 13.3 May 13, 2021
12 12.7 May 13, 2021
11 11.12 May 13, 2021

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CVSS 3.0

Overall Score 6.5
Component core server
Vector AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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