PostgreSQL is vulnerable to information disclosure. An information leak occurs when the server handles certain error messages, allowing an authenticated database user could to obtain results of a query they did not have privileges to execute, by observing the constraint violation error messages produced when the query is executed.
www.debian.org/security/2015/dsa-3155
www.postgresql.org/about/news/1569/
www.postgresql.org/docs/9.4/static/release-9-4-1.html
www.postgresql.org/docs/current/static/release-9-0-19.html
www.postgresql.org/docs/current/static/release-9-1-15.html
www.postgresql.org/docs/current/static/release-9-2-10.html
www.postgresql.org/docs/current/static/release-9-3-6.html
access.redhat.com/security/updates/classification/#moderate
rhn.redhat.com/errata/RHSA-2015-0699.html