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Epic Games Psyonix Rocket League <=1.95 Insecure Permissions

🗓️ 30 Apr 2021 00:00:00Reported by Gjoko KrsticType 
zeroscience
 zeroscience
🔗 www.zeroscience.mk👁 92 Views

Rocket League <=1.95 Insecure Permissions Privilege Escalation

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<html><body><p>Epic Games Psyonix Rocket League &lt;=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: &lt;=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&gt;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&gt;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&gt;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
</p></body></html>

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30 Apr 2021 00:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 48.5
CVSS 3.18.8
EPSS0.00043
SSVC
92