BMC Remedy Action Request System 5.01.02 Patch 1267 generates different error messages for failed login attempts with a valid username than for those with an invalid username, which allows remote attackers to determine valid account names.
https://exchange.xforce.ibmcloud.com/vulnerabilities/31527
http://www.vupen.com/english/advisories/2007/0204
http://www.securityfocus.com/bid/22066
http://www.securityfocus.com/archive/1/457078/100/0/threaded
http://www.securityfocus.com/archive/1/456949/100/0/threaded
http://www.alighieri.org/advisories/advisory-remedy50102.txt
http://securitytracker.com/id?1017515
http://securityreason.com/securityalert/2162