PeanutHull Local Privilege Escalation Vulnerability

by Sowhat

Last Update:2005.09.24

EN: http://secway.org/advisory/AD20050720EN.txt
CN: http://secway.org/advisory/AD20050720CN.txt

CVE:CAN-2005-2382
BID:14330

Product Affected:

PeanutHull <= 3.0.1.0


Overview:

Oray Inc. is the world's biggest DDNS (Dynamic Domain Name Service)
 Provider (According to their WEBSITE). PeanutHull is the DDNS client
For more information ,see http://www.oray.net 

Details:

The vulnerability is caused due to SYSTEM privileges are not 
dropped when accessing the PeanutHull from the System Tray icon.

A local non-privileged user can access the application via the 
system tray and can execute commands with Local System privileges.

Exploit:
1. Double click on the PeanutHull icon in the Taskbar to open 
   the PeanutHull window.
2. Click Help, click BBS
3. Type C:\ in the poped up IE Address BAR
4. Navagate to %WINDIR%\System32\
5. click CMD.exe 
6. A new command shell will open with SYSTEM privileges

Exploitng this vulnerability allows local non-privileged user
to obtain SYSTEM privilege.

Vendor Response:

2005.07.13 Vendor notified via email 
2005.07.14 Vendor responsed that this problem will be fixed 
           in the 3.0 Final Version.
2005.07.20 PeanutHull 3.0 Released
2005.07.20 So I released this advisory


Updated: 

According to Secunia's verification, the 3.0.1.0 is still vulnerable.
Non-privileged user can invoke the PeanutHull window by sending a SW_SHOW
message.

2005.07.21  new Proof of Concept code released.

Exploit:
http://secway.org/exploit/PeanutHull_Local.rar

Solution:
No workaroud this time.
Plz grant only trusted users access to the affected systems.