CVE-2008-1135
OMEGA (aka Omegasoft) INterneSErvicesLosungen (INSEL) 7 generates different responses depending on whether or not a username is valid in a failed login attempt, which allows remote attackers to enumerate valid usernames.
Date published : 2008-03-04
http://www.securityfocus.com/bid/27210
http://www.securityfocus.com/archive/1/486009/100/0/threaded