FileZilla FTP Client 3.17.0.0 - Unquoted Path Privilege Escalation

2016-05-11T00:00:00
ID 1337DAY-ID-25585
Type zdt
Reporter Cyril Vallicari
Modified 2016-05-11T00:00:00

Description

Exploit for windows platform in category local exploits

                                        
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# 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 Files\FileZilla FTP
Client\uninstall.exe _?=C:\Program Files\FileZilla 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

#  0day.today [2018-01-10]  #