The web interface in Open Computer and Software Inventory Next Generation (OCS Inventory NG) 1.01 generates different error messages depending on whether a username is valid, which allows remote attackers to enumerate valid usernames.
https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00063.html
https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00057.html
https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00050.html
http://www.securityfocus.com/bid/35023
http://secunia.com/advisories/35313