Microsoft SQL Server before Windows 2000 SP4 allows local users to gain privileges as the SQL Server user by calling the xp_fileexist extended stored procedure with a named pipe as an argument instead of a normal file.Referenceshttp://marc.info/?l=bugtraq&m=105820282607865&w=2http://www.atstake.com/research/advisories/2003/a070803-1.txthttp://marc.info/?l=bugtraq&m=105830986720243&w=2http://archives.neohapsis.com/archives/vulnwatch/2003-q3/0013.html
