Samsung SW Update Service Privilege Escalation

2016-11-09T00:00:00
ID PACKETSTORM:139653
Type packetstorm
Reporter Yunus YILDIRIM
Modified 2016-11-09T00:00:00

Description

                                        
                                            `# Exploit Title: Samsung SW Update Service Unquoted Service Path Privilege Escalation  
# Date: 04/10/2016  
# Author: Yunus YILDIRIM (Th3GundY)  
# Team: CT-Zer0 (@CRYPTTECH) && Superbug (@xsuperbug)  
# Website: http://yildirimyunus.com  
# Contact: yunusyildirim@protonmail.com  
# Category: local  
# Vendor Homepage: http://www.samsung.com  
# Software Link: http://downloadcenter.samsung.com/content/SW/201608/20160825024052515/SWUpdate_2.2.8.28.ZIP  
# Version: Affected Software Version < 2.2.8.30  
# Tested on: Windows 7 x86/x64 & Windows 10 x64/x86  
  
1. Description  
  
Samsung Software Update Service, SWUpdateService (SWMAgent.exe), installs as a service with   
an unquoted service path running with SYSTEM privileges.  
This could potentially allow an authorized but non-privileged local  
user to execute arbitrary code with elevated privileges on the system.  
  
  
2. Proof of Concept  
  
C:\>sc qc SWUpdateService  
[SC] QueryServiceConfig SUCCESS  
SERVICE_NAME: SWUpdateService  
TYPE : 110 WIN32_OWN_PROCESS (interactive)  
START_TYPE : 2 AUTO_START  
ERROR_CONTROL : 1 NORMAL  
BINARY_PATH_NAME : C:\ProgramData\Samsung\SW Update Service\SWMAgent.exe /SERVICE  
LOAD_ORDER_GROUP :  
TAG : 0  
DISPLAY_NAME : SW Update Service  
DEPENDENCIES :  
SERVICE_START_NAME : LocalSystem   
  
  
3. Exploit:  
  
A successful attempt would require the local attacker must insert an executable file  
in the path of the service.  
Upon service restart or system reboot, the malicious code will be run with elevated privileges.  
  
  
Vulnerability Disclosure Timeline:  
=========================  
04/10/2016 - Contact With Vendor  
04/10/2016 - Vendor Response  
18/10/2016 - Release Fixed Version  
  
  
Additional notes :  
=========================  
Fixed version 2.2.8.30  
`