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DriverStudio Remote Control Authentication Bypass Vulnerability



DriverStudio Remote Control Authentication Bypass Vulnerability

by cocoruder
page:http://ruder.cdut.net
email:cocoruder@xxxxxxx && frankruder@xxxxxxxxxxx

Last Update:2005.09.10
class:design error
date:10/9/2005
Remote:yes
local:yes

Product Affected:
>=NuMega.DriverStudio.v2.7

I  test successfully on: 
NuMega.DriverStudio.v2.7(windows 2000 sp4|windows xp sp1)
NuMega.DriverStudio.v3.0beta2(windows 2000 sp4|windows xp sp1)

Vendor:
www.compuware.com

Overview:
SoftICE Driver Suite is an most popular kenerl-debug software suite,the 
default-setup "DriverStudio Remote Contro" service(process name:DSRsvc.exe) 
allow a user to configure Softice on the remote computer,authenticate with 
currently-login username and password. but the authentication can be 
bypassed,that any remote attacker can modifit  local Softice-setting 
file(winice.dat).

Details:
the remote-control communications use DEC RPC protocol,authenticate with 
NTLMv1,if we authenticate with NULL Session Login(NULL user name,NULL NTLM 
hash),we can also authenticate successfully.that we can modifit 
"winice.dat".disable the windows NULL Session Login will not be effective.
another vulnerability is erveryone send follow buffer to the UDP port 9110 can 
make the system reboot. 
02 00 00 00 41 41 41 00         ;00000002 --->reboot command
colligate the two vulnerability can get system privilege.

exploit:
1.modifit winice.dat(use modifit_config.cpp to send winice_attack.dat to target)
2.modifit softice boot-type to:Automatic
3.send the reboot buffer to target UDP 9110,and waiting target computer 
reboot(use send_reboot.cpp)
4.send shellcode buffer to UDP 9110(use send_shellcode.cpp)

all the code will not be published until the vendor release the patch:)