----------------------------------- # Exploit Title: Filezilla 3.17.0.0 windows installer Privileges Escalation via unquoted path vulnerability # Date: 08/05/2016 # Exploit Author: Cyril Vallicari # Vendor Homepage: https://filezilla-project.org/ # Software Link: https://filezilla-project.org/download.php?type=client # Version: 3.17.0.0 # Tested on: Windows 7 x64 SP1 (but it should works on all windows version) # CVE : Asked it is reviewed (11/08/2016) Summary : FileZilla is a free software, cross-platform FTP application, consisting of FileZilla Client and FileZilla Server. Client binaries are available for Windows, Linux, and Mac OS X. Description : The installer of Filezilla for Windows version 3.17.0.0 and probably prior and prone to unquoted path vulnerability . The unquoted command called is : C:Program FilesFileZilla FTP Clientuninstall.exe _?=C:Program FilesFileZilla FTP Client This could potentially allow an authorized but non-privileged local user to execute arbitrary code with elevated privileges on the system. POC : Put a software named "Program.exe" in C: (or named Filezilla.exe/Filezilla FTP.exe in Program Files) Then uninstall Filezilla from installer After clicking "Next" on the installer window, Program.exe is execute with Administrator rights POC video : https://www.youtube.com/watch?v=r06VwwJ9J4M Patch : Fixed in version 3.17.0.1 ---------------------------------------------------------------------