CVE-2007-2999 Information

Description

Microsoft Windows Server 2003 when time restrictions are in effect for user accounts generates different error messages for failed login attempts with a valid user name than for those with an invalid user name which allows context-dependent attackers to determine valid Active Directory account names.

Reference

http://osvdb.org/36138 http://secunia.com/advisories/25457 http://www.notsosecure.com/folder2/2007/05/27/logon-time-restrictions-in-a-domain-in-windows-server-2003-allows-username-enumeration/ http://www.securityfocus.com/bid/24248