ADP Elite System Max 9000 Series Login Vulnerability

Adp Elite system is an invoice/purchase order suite very common in car 
dealerships. It's a telnet based system. When a user logs in via telnet, adp 
dumps the user into the program where the user can check on a vehicle's status, 
generate PO's and RO's, etc.... The program is rather large and runs on a linux 
based system. Usually ftp is running as well. A user with a valid login 
name/pass... eh...cough...ettercap...cough is able to upload/download things 
into/from their directory... usually something like /adp/home/<user>.... by 
default there is a .profile containing this little gem...

# ADPROOT is equivalent to REALROOT on CoRA systems
ADPROOT=${ADPROOT:="/adp"}
export ADPROOT

download it... modify it to

# ADPROOT is equivalent to REALROOT on CoRA systems
ADPROOT=${ADPROOT:="/"}
export ADPROOT

then upload it...

now login via telnet... and bingo now you have a $hell

fix: chown root:root .profile

credit: rootfiend
questions/comments: rootfiend@safe-mail.net