Title: Epic Games Easy Anti-Cheat 4.0 Local Privilege Escalation
Advisory ID: ZSL-2021-5652
Type: Local
Impact: Privilege Escalation
Risk: (2/5)
Release Date: 06.05.2021

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.

Description

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.

Vendor

Epic Games, Inc. - https://www.epicgames.com | https://www.easy.ac

Affected Version

4.0.0.0

Tested On

Microsoft Windows 10

Vendor Status

N/A

PoC

easyanticheat_eop.txt

Credits

Vulnerability discovered by Gjoko Krstic - <gjoko@zeroscience.mk>

References

[1] https://cxsecurity.com/issue/WLB-2021050040
[2] https://www.exploit-db.com/exploits/49841
[3] https://packetstormsecurity.com/files/162503/
[4] https://exchange.xforce.ibmcloud.com/vulnerabilities/201455

Changelog

[06.05.2021] - Initial release
[19.06.2021] - Added reference [1], [2], [3] and [4]

Contact

Zero Science Lab

Web: https://www.zeroscience.mk
e-mail: lab@zeroscience.mk