The core server component in PostgreSQL 8.3 before 8.3.8 and 8.2 before 8.2.14, when using LDAP authentication with anonymous binds, allows remote attackers to bypass authentication via an empty password.
https://www.redhat.com/archives/fedora-package-announce/2009-September/msg00307.html
https://www.redhat.com/archives/fedora-package-announce/2009-September/msg00305.html
https://bugzilla.redhat.com/show_bug.cgi?id=522084
http://www.ubuntu.com/usn/usn-834-1
http://www.postgresql.org/docs/8.3/static/release-8-3-8.html
http://marc.info/?l=bugtraq&m=134124585221119&w=2
http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html