PostgreSQL is vulnerable to denial of service(DoS) attacks. A remote authenticated user could exploit an access control flaw in the lo_put() function to change the data in a large object and cause denial of service conditions which leads application to a crash.
www.debian.org/security/2017/dsa-3935
www.debian.org/security/2017/dsa-3936
www.securityfocus.com/bid/100276
www.securitytracker.com/id/1039142
access.redhat.com/errata/RHSA-2017:2677
access.redhat.com/errata/RHSA-2017:2678
access.redhat.com/security/updates/classification/#moderate
security.gentoo.org/glsa/201710-06
www.postgresql.org/about/news/1772/
www.postgresql.org/docs/current/static/release-9-4-13.html
www.postgresql.org/docs/current/static/release-9-4-14.html