PostgreSQL privilege escalation

PostgreSQL 8.2 before 8.2.6, 8.1 before 8.1.11, 8.0 before 8.0.15, 7.4 before 7.4.19, and 7.3 before 7.3.21 uses superuser privileges instead of table owner privileges for 1 VACUUM and 2 ANALYZE operations within index functions, and supports 3 SET ROLE and 4 SET SESSION AUTHORIZATION within inde...