PostgreSQL is an advanced object-relational database management system(DBMS).A stack-based buffer overflow flaw was found in the way PostgreSQLprocessed certain tokens from an SQL query when the intarray module wasenabled on a particular database. An authenticated database user running aspecially-crafted SQL query could use this flaw to cause a temporary denialof service (postgres daemon crash) or, potentially, execute arbitrary codewith the privileges of the database server. (CVE-2010-4015)Red Hat would like to thank Geoff Keating of the Apple Product Securityteam for reporting this issue.For Red Hat Enterprise Linux 4, the updated postgresql packages contain abackported patch for this issue; there are no other changes.For Red Hat Enterprise Linux 5, the updated postgresql packages upgradePostgreSQL to version 8.1.23, and contain a backported patch for thisissue. Refer to the PostgreSQL Release Notes for a full list of changes:http://www.postgresql.org/docs/8.1/static/release.htmlFor Red Hat Enterprise Linux 6, the updated postgresql packages upgradePostgreSQL to version 8.4.7, which includes a fix for this issue. Refer tothe PostgreSQL Release Notes for a full list of changes:http://www.postgresql.org/docs/8.4/static/release.htmlAll PostgreSQL users are advised to upgrade to these updated packages,which correct this issue. If the postgresql service is running, it will beautomatically restarted after installing this update.