Epic Games Easy Anti-Cheat 4.0 - Local Privilege Escalation

vendor:

Easy Anti-Cheat

by:

LiquidWorm

7.2

CVSS

HIGH

Local Privilege Escalation

264

CWE

Product Name: Easy Anti-Cheat

Affected Version From: 4.0.0.0

Affected Version To: 4.0.0.0

Patch Exists: No

Related CWE: N/A

CPE: a:epic_games:easy_anti-cheat

Metasploit: N/A

Other Scripts: N/A

Platforms Tested: Microsoft Windows 10

2021

Epic Games Easy Anti-Cheat 4.0 – Local Privilege Escalation

The application suffers from an unquoted search path issue impacting the service 'EasyAntiCheat' for Windows deployed as part of Easy Anti-Cheat Service application. This could potentially allow an authorized but non-privileged local user to execute arbitrary code with elevated privileges on the system. A successful attempt would require the local user to be able to insert their code in the system root path undetected by the OS or other security applications where it could potentially be executed during application startup or reboot. If successful, the local user's code would execute with the elevated privileges of the application.

Mitigation:

Ensure that the application is installed in a directory with a valid path name and that the path name is properly quoted.

Source

Exploit-DB raw data:

# Exploit Title: Epic Games Easy Anti-Cheat 4.0 - Local Privilege Escalation
# Date: 04.05.2021
# Exploit Author: LiquidWorm
# Vendor Homepage: https://www.epicgames.com https://www.easy.ac

Epic Games Easy Anti-Cheat 4.0 Local Privilege Escalation


Vendor: Epic Games, Inc.
Product web page: https://www.epicgames.com
                  https://www.easy.ac
Affected version: 4.0.0.0

Summary: Easy Anti-Cheat is the industry-leading anti–cheat service,
countering hacking and cheating in multiplayer PC games through the
use of hybrid anti–cheat mechanisms.

Desc: The application suffers from an unquoted search path issue impacting
the service 'EasyAntiCheat' for Windows deployed as part of Easy Anti-Cheat
Service application. This could potentially allow an authorized but non-privileged
local user to execute arbitrary code with elevated privileges on the system.
A successful attempt would require the local user to be able to insert their
code in the system root path undetected by the OS or other security applications
where it could potentially be executed during application startup or reboot.
If successful, the local user's code would execute with the elevated privileges
of the application.

Tested on: Microsoft Windows 10


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2021-5652
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5652.php


04.05.2021

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C:\Users>sc qc EasyAntiCheat
[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: EasyAntiCheat
        TYPE               : 10  WIN32_OWN_PROCESS
        START_TYPE         : 3   DEMAND_START
        ERROR_CONTROL      : 1   NORMAL
        BINARY_PATH_NAME   : C:\Program Files (x86)\EasyAntiCheat\EasyAntiCheat.exe
        LOAD_ORDER_GROUP   :
        TAG                : 0
        DISPLAY_NAME       : EasyAntiCheat
        DEPENDENCIES       :
        SERVICE_START_NAME : LocalSystem