bugtraq id 1328 class Design Error cve CVE-2000-0499 remote Yes local Yes published June 08, 2000 updated November 10, 2000 vulnerable BEA Systems Weblogic 4.5.1 - Microsoft Windows NT 4.0 BEA Systems Weblogic 4.0.4 - Microsoft Windows NT 4.0 BEA Systems Weblogic 3.1.8 - Microsoft Windows NT 4.0 IBM Websphere application Server 3.0.21 - Sun Solaris 8.0 - Microsoft Windows NT 4.0 - linux kernel 2.3.x - IBM AIX 4.3 Unify eWave ServletExec 3.0 - Sun Solaris 8.0 - Microsoft Windows 98 - Microsoft Windows NT 4.0 - Microsoft Windows NT 2000 - Linux kernel 2.3.x - IBM AIX 4.3.2 - HP HP-UX 11.4
Many webservers are case-sensitive, but do not have all possible combinations of cases in mapped extensions mapped PRoperly.
By changing the letters in a jsp or a JHTML file extension from lower case to upper case (eg: .jsp or .jhtml becomes .JSP or .JHTML) in a URL the server does not recognize the file extension and sends the file normally. In that manner, a user is able to access the source code to those specific files.