promise-root.txt

`List,  
  
There is a bug in the Promise NAS NS4300N web GUI (firmware version 1.1.0.5)  
which allows an authenticated (admin) user to change the password of the  
'root' account.  
  
The user management portion of the web interface allows the admin user to  
change user's passwords. The PHP script that handles this does not check to  
see if the admin is changing a user account or system accounts such as  
'root'.  
  
By changing the value of the 'user' parameter to 'root' (from whatever user  
id whose password is being changed, e.g. 'admin' if you have not defined any  
users) in the POST request to /usercp.php, we can provide a known password  
for the root account and thereby login to the NAS (which is normally not  
possible because Promise has not divulged root's password).  
  
The vendor has not been notified, but this is hardly a critical issue..?  
  
Tor  
  
moonshade:~$ telnet 192.168.5.16 2380  
Trying 192.168.5.16...  
Connected to 192.168.5.16.  
Escape character is '^]'.  
NS4300N R1.1 A10 (Version 01.01.0000.05) - Promise Technology, INC.  
nas login: root  
Password:   
  
  
BusyBox v1.00-rc2 (2006.11.07-01:55+0000) Built-in shell (ash)  
Enter 'help' for a list of built-in commands.  
  
root is allowed to login.  
[root@nas]# dmesg  
Linux version 2.6.11SR1_1_2 ([email protected]) (gcc version 3.4.1) #2 Tue Apr 3 15:43:13 CST 2007  
On node 0 totalpages: 32768  
DMA zone: 32768 pages, LIFO batch:8  
Normal zone: 0 pages, LIFO batch:1  
HighMem zone: 0 pages, LIFO batch:1  
Built 1 zonelists  
Kernel command line: root=/dev/ram rw console=ttyS0,115200  
IPIC (128 IRQ sources, 8 External IRQs) at fe000700  
PID hash table entries: 1024 (order: 10, 16384 bytes)  
Console: colour dummy device 80x25  
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)  
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)  
Memory: 123936k available (2276k kernel code, 660k data, 312k init, 0k highmem)  
Calibrating delay loop... 265.21 BogoMIPS (lpj=132608)  
  
--  
http://www.bogus.net/~torh  
`