Helix GNOME Updater helix-update 0.5 and earlier allows local users to install arbitrary RPM packages by creating the /tmp/helix-install installation directory before root has begun installing packages.
http://www.securityfocus.com/templates/archive.pike?list=1&msg=E13QAYl-0007il-00%40the-village.bc.nu
http://www.securityfocus.com/bid/1593
http://archives.neohapsis.com/archives/bugtraq/2000-08/0251.html
http://archives.neohapsis.com/archives/bugtraq/2000-08/0240.html