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CVE-2021-42785

Published: 23 November 2021

Buffer Overflow vulnerability in tvnviewer.exe of TightVNC Viewer allows a remote attacker to execute arbitrary instructions via a crafted FramebufferUpdate packet from a VNC server.

Notes

AuthorNote
seth-arnold
Affects windows version

Priority

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
tightvnc
Launchpad, Ubuntu, Debian
bionic Not vulnerable

focal Not vulnerable

hirsute Not vulnerable

impish Not vulnerable

trusty Not vulnerable

upstream Not vulnerable

jammy Not vulnerable

kinetic Not vulnerable

lunar Not vulnerable

xenial Needed

mantic Not vulnerable

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H