UNIX file setuid sucurity hole?

[guy at gorodish.UUCP]

>2) On AT&T systems, you can give files away if you own them;

A nit - on "USG" systems (System III, System V, and various other systems in
that line of descent), you can give files away if you own them.  V6, V7, and
32V (from which 3BSD and 4BSD systems are derived) were also most definitely
AT&T systems, and they didn't allow you to give files away (so as not to
defeat (the non-existent) disk space accounting procedures, claimed the
manual).