no more /sbin in root path... been rooted?

[David Raulo <David.Raulo@inrialpes.fr>]

Hi all,

I have 2 woody boxes, the first one configured as an adsl firewall (a simple 
iptable-deny-everything stuff, no local service running, only LAN originated 
traffic allowed).  On the second box since yesterday, my path when logging as 
root became "/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/games", like the 
one for an ordinary user.  Same behavior if I "su -" from an ordinary 
account, but the good old root path is back if I just type "su" (without the 
hyphen).

Where does Debian define the root login path?  I checked /etc/login.defs (and 
of course /root/.bashrc), but nothing changed / my other woody box.  Btw why 
is the default user path defined both in /etc/login.defs and /etc/profile?

Is this strange behavior a known sign of intrusion? I got nothing unusual in 
both machines's logs... I also tried chkrootkit, nothing found.  Of course I 
might also have done something wrong, but can't remember what.

Does anyone have a hint on what's going on?

Thanks,
David.