Two serious security errors have been found in PostgreSQL 7.3 and newer releases. These errors at least allow an unprivileged database user to crash the backend process, and may make it possible for an unprivileged user to gain the privileges of a database superuser.
http://archives.postgresql.org/pgsql-announce/2005-05/msg00001.php
This issue should also affect RHEL3
Updates are now in QA for both RHEL4 and RHEL3. These issues do not affect AS2.1.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2005-433.html