Epic Games Launcher 7.9.4-4058369 Insecure File Permissions

i>>?
Epic Games Launcher 7.9.4-4058369 Insecure File Permissions


Vendor: Epic Games, Inc.
Product web page: https://www.epicgames.com
Affected version: 7.9.4-4058 i>>?
Epic Games Launcher 7.9.4-4058369 Insecure File Permissions


Vendor: Epic Games, Inc.
Product web page: https://www.epicgames.com
Affected version: 7.9.4-4058369
7.9.3-4051644
7.9.2
7.9.1-4016505
7.8.0-3988049
7.7.0


Summary: Epic Games Launcher is a shareware desktop tool that
allows you to buy and download games and other products from
Epic Games. Through this program, you can get games like Fortnite,
Unreal Tournament, Shadow Complex, and Paragon. Also, you can
download tools like Unreal Engine and ARK Dev Kit. The program
includes a social feature that allows you to add friends, change
your status, and more.

Desc: The Epic Games Launcher 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
'Users' group.

Tested on: Microsoft Windows 10 Home


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience


Advisory ID: ZSL-2018-5468
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2018-5468.php


10.04.2018

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C:Program Files (x86)Epic GamesLauncherEngineBinariesWin64>icacls EpicGamesLauncher.exe
EpicGamesLauncher.exe BUILTINUsers:(I)(F)
NT AUTHORITYSYSTEM:(I)(F)
BUILTINAdministrators:(I)(F)
APPLICATION PACKAGE AUTHORITYALL APPLICATION PACKAGES:(I)(RX)
APPLICATION PACKAGE AUTHORITYALL RESTRICTED APPLICATION PACKAGES:(I)(RX)

Successfully processed 1 files; Failed processing 0 files

C:Program Files (x86)Epic GamesLauncherEngineBinariesWin64>


----------------------


C:Program Files (x86)Epic Games>cacls Launcher
C:Program Files (x86)Epic GamesLauncher BUILTINUsers:(OI)(CI)(ID)F
NT SERVICETrustedInstaller:(ID)F
NT SERVICETrustedInstaller:(CI)(IO)(ID)F
NT AUTHORITYSYSTEM:(ID)F
NT AUTHORITYSYSTEM:(OI)(CI)(IO)(ID)F
BUILTINAdministrators:(ID)F
BUILTINAdministrators:(OI)(CI)(IO)(ID)F
BUILTINUsers:(OI)(CI)(IO)(ID)(special access:)
GENERIC_READ
GENERIC_EXECUTE

CREATOR OWNER:(OI)(CI)(IO)(ID)F
APPLICATION PACKAGE AUTHORITYALL APPLICATION PACKAGES:(ID)R
APPLICATION PACKAGE AUTHORITYALL APPLICATION PACKAGES:(OI)(CI)(IO)(ID)(special access:)
GENERIC_READ
GENERIC_EXECUTE

APPLICATION PACKAGE AUTHORITYALL RESTRICTED APPLICATION PACKAGES:(ID)R
APPLICATION PACKAGE AUTHORITYALL RESTRICTED APPLICATION PACKAGES:(OI)(CI)(IO)(ID)(special access:)
GENERIC_READ
GENERIC_EXECUTE