Exploit:

   if [ -f /etc/dhcpc/resolv.conf ]; then
     echo "setting up resolv.conf" >> /tmp/dhcplog
     cp /etc/dhcpc/resolv.conf /etc
   fi

 There is no protection against the dhcplog file
 being a symbolic link, clobbering, blah de blah.

                             "Mark A. Spencer"