UltraVNC Viewer 1.2.4.0 contains a denial of service vulnerability that allows attackers to crash the application by manipulating VNC Server input. Attackers can generate a malformed 256-byte payload and paste it into the VNC Server connection dialog to trigger an application crash.
Exploitability
AV:LAC:LAT:NPR:NUI:AVulnerable System
VC:NVI:NVA:LSubsequent System
SC:NSI:NSA:N4.6/CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NResource Management