Public on 2024-02-08
Modified on 2024-02-10
Late privilege drop in REFRESH MATERIALIZED VIEW CONCURRENTLY in PostgreSQL allows an object creator to execute arbitrary SQL functions as the command issuer. The command intends to run SQL functions as the owner of the materialized view, enabling safe refresh of untrusted materialized views. The victim is a superuser or member of one of the attacker's roles. The attack requires luring the victim into running REFRESH MATERIALIZED VIEW CONCURRENTLY on the attacker's materialized view. As part of exploiting this vulnerability, the attacker creates functions that use CREATE RULE to convert the internally-built temporary table to a view. Versions before PostgreSQL 15.6, 14.11, 13.14, and 12.18 are affected. The only known exploit does not work in PostgreSQL 16 and later. For defense in depth, PostgreSQL 16.2 adds the protections that older branches are using to fix their vulnerability.
Important severity
CVSS v3 Base Score
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Postgresql12 Extra libpq 2024-02-29 ALAS2POSTGRESQL12-2024-009 Fixed
Amazon Linux 2 - Postgresql14 Extra libpq 2024-02-29 ALAS2POSTGRESQL14-2024-007 Fixed
Amazon Linux 2 - Core postgresql Not Affected
Amazon Linux 2 - Postgresql12 Extra postgresql 2024-02-29 ALAS2POSTGRESQL12-2024-008 Fixed
Amazon Linux 2 - Postgresql13 Extra postgresql 2024-02-29 ALAS2POSTGRESQL13-2024-006 Fixed
Amazon Linux 2 - Postgresql14 Extra postgresql 2024-02-29 ALAS2POSTGRESQL14-2024-006 Fixed
Amazon Linux 2023 postgresql15 2024-02-29 ALAS2023-2024-547 Fixed
Amazon Linux 1 postgresql8 Not Affected
Amazon Linux 1 postgresql92 Not Affected
Amazon Linux 1 postgresql93 No Fix Planned
Amazon Linux 1 postgresql94 No Fix Planned
Amazon Linux 1 postgresql95 No Fix Planned
Amazon Linux 1 postgresql96 No Fix Planned

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 8.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H