There is a group-utmp-to-root privilege escalation vulnerability in /bin/login in Debian, and I expect in all other Linux distros. For details and exploit please see http://bugs.debian.org/505271 Currently am not aware of any group utmp issues (that could be leveraged to get root). Cheers, Paul Szabo psz@xxxxxxxxxxxxxxxxx http://www.maths.usyd.edu.au/u/psz/ School of Mathematics and Statistics University of Sydney Australia