SOYAL 701Server 9.0.1 Insecure Permissions

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SOYAL 701Server 9.0.1 Insecure Permissions  
  
  
Vendor: SOYAL Technology Co., Ltd  
Product web page: https://www.soyal.com.tw | https://www.soyal.com  
Affected version: 9.0.1 190322  
8.0.6 181227  
  
Summary: 701 Server is the program used to set up and configure LAN  
and IP based access control systems, from the COM port used to the  
quantity and type of controllers connected. It is also used for  
programming some of the more complex controllers such as the AR-716E  
and the AR-829E.  
  
Desc: The application suffers from an elevation of privileges vulnerability  
which can be used by a simple authenticated user that can change the  
executable file with a binary of choice. The vulnerability exist due  
to the improper permissions, with the 'F' flag (Full) for 'Everyone'  
and 'Authenticated Users' group.  
  
Tested on: Microsoft Windows 10 Enterprise  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2021-5633  
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5633.php  
  
  
25.01.2021  
  
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C:\Program Files (x86)\701Server>cacls McuServer.exe  
C:\Program Files (x86)\701Server\McuServer.exe Everyone:F  
NT AUTHORITY\Authenticated Users:(ID)F  
NT AUTHORITY\SYSTEM:(ID)F  
BUILTIN\Administrators:(ID)F  
BUILTIN\Users:(ID)R  
APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(ID)R  
APPLICATION PACKAGE AUTHORITY\ALL RESTRICTED APPLICATION PACKAGES:(ID)R  
  
C:\Program Files (x86)\701Server>  
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