Epic Games Rocket League 1.95 Insecure Permissions

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Epic Games Psyonix Rocket League <=1.95 Insecure Permissions  
  
  
Vendor: Epic Games Inc. | Psyonix, LLC  
Product web page: https://www.epicgames.com  
https://www.psyonix.com  
https://www.rocketleague.com  
Affected version: <=1.95  
  
Summary: Rocket League is a high-powered hybrid of arcade-style soccer  
and vehicular mayhem with easy-to-understand controls and fluid, physics-driven  
competition.  
  
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 'Authenticated Users' group.  
  
Tested on: Microsoft Windows 10  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2021-5650  
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5650.php  
  
  
20.04.2021  
  
--  
  
  
E:\Epic Games\rocketleague\Binaries\Win64>cacls RocketLeague.exe  
E:\Epic Games\rocketleague\Binaries\Win64\RocketLeague.exe BUILTIN\Administrators:F  
NT AUTHORITY\SYSTEM:F  
NT AUTHORITY\Authenticated Users:C  
BUILTIN\Users:R  
  
  
E:\Epic Games\rocketleague>cacls Binaries  
E:\Epic Games\rocketleague\Binaries BUILTIN\Administrators:F  
BUILTIN\Administrators:(OI)(CI)(IO)F  
NT AUTHORITY\SYSTEM:F  
NT AUTHORITY\SYSTEM:(OI)(CI)(IO)F  
NT AUTHORITY\Authenticated Users:C  
NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)C  
BUILTIN\Users:R  
BUILTIN\Users:(OI)(CI)(IO)(special access:)  
GENERIC_READ  
GENERIC_EXECUTE  
  
  
E:\Epic Games\rocketleague>cacls TAGame  
E:\Epic Games\rocketleague\TAGame BUILTIN\Administrators:F  
BUILTIN\Administrators:(OI)(CI)(IO)F  
NT AUTHORITY\SYSTEM:F  
NT AUTHORITY\SYSTEM:(OI)(CI)(IO)F  
NT AUTHORITY\Authenticated Users:C  
NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)C  
BUILTIN\Users:R  
BUILTIN\Users:(OI)(CI)(IO)(special access:)  
GENERIC_READ  
GENERIC_EXECUTE  
`