BitRaider Streaming Client 1.3.3.4098 Local Privilege Escalation Vulnerability
Vendor: BitRaider, LLC
Product web page: http://www.bitraider.com
Affected version: 1.3.3.4098
Summary: BitRaider is a video game streaming and download service.
Desc: BitRaider contains a flaw that leads to unauthorized privileges being gained.
The issue is due to the program granting improper permissions with the 'F' flag for
the 'Users' group, which makes the entire 'BitRaider' directory and its sub directories
and files world-writable. This may allow a local attacker to change an executable file
with a binary file and gain elevated privileges.
List of executables affected:
o====================================================================================================o
| Binary/location | Description |
| | |
|=============================================================== ====================================|
| C:\ProgramData\BitRaider\BRSptStub.exe | BitRaider Support Stub |
|---------------------------------------------------------------|------------------------------------|
| C:\ProgramData\BitRaider\common\BRException.exe | BitRaider Exception Handler |
|---------------------------------------------------------------|------------------------------------|
| C:\ProgramData\BitRaider\common\brwc.exe | BitRaider Distribution Web Client |
|---------------------------------------------------------------|------------------------------------|
| C:\ProgramData\BitRaider\support\1.3.3\E02B25FC\BRSptSvc.exe | BitRaider Support Service Core |
o====================================================================================================o
Tested on: Microsoft Windows 7 Professional SP1 (EN)
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience
Advisory ID: ZSL-2014-5217
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2014-5217.php
17.12.2014
----
C:\Users\user>sc qc BRSptStub
[SC] QueryServiceConfig SUCCESS
SERVICE_NAME: BRSptStub
TYPE : 10 WIN32_OWN_PROCESS
START_TYPE : 3 DEMAND_START
ERROR_CONTROL : 0 IGNORE
BINARY_PATH_NAME : "C:\ProgramData\BitRaider\BRSptStub.exe"
LOAD_ORDER_GROUP :
TAG : 0
DISPLAY_NAME : BitRaider Mini-Support Service Stub Loader
DEPENDENCIES :
SERVICE_START_NAME : LocalSystem
C:\Users\user>icacls "C:\ProgramData\BitRaider\BRSptStub.exe"
C:\ProgramData\BitRaider\BRSptStub.exe BUILTIN\Users:(F) <--------------------------
NT AUTHORITY\SYSTEM:(F)
NT AUTHORITY\Authenticated Users:(F) <-------
BUILTIN\Administrators:(F)
NT AUTHORITY\INTERACTIVE:(F) <---------------
NT AUTHORITY\SERVICE:(F)
BUILTIN\Guests:(RX)
BUILTIN\Users:(I)(F) <-----------------------
NT AUTHORITY\SYSTEM:(I)(F)
NT AUTHORITY\Authenticated Users:(I)(F) <----
BUILTIN\Administrators:(I)(F)
NT AUTHORITY\INTERACTIVE:(I)(F) <------------
NT AUTHORITY\SERVICE:(I)(F)
BUILTIN\Guests:(I)(RX)
Successfully processed 1 files; Failed processing 0 files
C:\Users\user>
