[+] Credits: John Page (aka hyp3rlinx) [+] Website: hyp3rlinx.altervista.org [+] Source: http://hyp3rlinx.altervista.org/advisories/WINGATE-INSECURE-PERMISSIONS-LOCAL-PRIVILEGE-ESCALATION.txt [+] twitter.com/hyp3rlinx [+] ISR: ApparitionSec [Vendor] wingate.com [Product] WinGate v9.4.1.5998 WinGate is a sophisticated integrated Internet gateway and communications server designed to meet the control, security and email needs of today's Internet-connected businesses. [Vulnerability Type] Insecure Permissions EoP [CVE Reference] CVE-2020-13866 [Security Issue] WinGate has insecure permissions for the installation directory, which allows local users ability to gain privileges by replacing an executable file with a Trojan horse. The WinGate directory hands (F) full control to authenticated users, who can then run arbitrary code as SYSTEM after a WinGate restart or system reboot. C:\Program Files\WinGate>cacls WinGate.exe C:\Program Files\WinGate\WinGate.exe NT AUTHORITY\Authenticated Users:(ID)F NT AUTHORITY\SYSTEM:(ID)F BUILTIN\Administrators:(ID)F BUILTIN\Users:(ID)R APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(ID)R APPLICATION PACKAGE AUTHORITY\ALL RESTRICTED APPLICATION PACKAGES:(ID)R [Affected Component] WinGate Installation Directory [Impact Code execution] true [Impact Denial of Service] true [Impact Escalation of Privileges] true [Impact Information Disclosure] true [Exploit/POC] Logon as standard user replace WinGate.exe with a trojan executable, wait for restart or reboot the system, your code runs as SYSTEM. [Network Access] Local [Severity] High [Disclosure Timeline] Vendor Notification: May 10, 2020 Vendor acknowledgement: May 10, 2020 Vulnerability confirmed: May 18, 2020 Request status: May 22, 2020 No reply Notify vendor request CVE: May 26, 2020 No reply Advised of public disclosure: June 1, 2020 No reply June 4, 2020 : Public Disclosure [+] Disclaimer The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. All content (c). hyp3rlinx