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CVE-2020-25708

Published: 13 November 2020

A divide by zero issue was found to occur in libvncserver-0.9.12. A malicious client could use this flaw to send a specially crafted message that, when processed by the VNC server, would lead to a floating point exception, resulting in a denial of service.

Notes

AuthorNote
leosilva
vino ships libvncserver source in server/libvncserver

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
x11vnc
Launchpad, Ubuntu, Debian
groovy Ignored
(end of life)
bionic Needs triage

hirsute Ignored
(end of life)
kinetic Ignored
(end of life, was needs-triage)
impish Ignored
(end of life)
xenial Needs triage

focal Needs triage

jammy Needs triage

trusty Needs triage

upstream Needs triage

mantic Needs triage

lunar Ignored
(end of life, was needs-triage)
libvncserver
Launchpad, Ubuntu, Debian
upstream Needs triage

trusty Does not exist

bionic
Released (0.9.11+dfsg-1ubuntu1.4)
focal
Released (0.9.12+dfsg-9ubuntu0.3)
groovy Not vulnerable

hirsute Not vulnerable

xenial
Released (0.9.10+dfsg-3ubuntu0.16.04.6)
impish Not vulnerable

jammy Not vulnerable

kinetic Not vulnerable

lunar Not vulnerable

mantic Not vulnerable

Patches:
upstream: https://github.com/LibVNC/libvncserver/commit/673c07a75ed844d74676f3ccdcfdc706a7052dba
vino
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic
Released (3.22.0-3ubuntu1.2)
groovy
Released (3.22.0-6ubuntu2.1)
xenial
Released (3.8.1-0ubuntu9.4)
hirsute
Released (3.22.0-6ubuntu3)
focal
Released (3.22.0-5ubuntu2.2)
impish
Released (3.22.0-6ubuntu3)
jammy
Released (3.22.0-6ubuntu3)
kinetic
Released (3.22.0-6ubuntu3)
lunar
Released (3.22.0-6ubuntu3)
upstream Needs triage

mantic
Released (3.22.0-6ubuntu3)
italc
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Does not exist

impish Does not exist

xenial Needs triage

groovy Does not exist

hirsute Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

trusty Does not exist
(trusty was needs-triage)
upstream Needs triage

mantic Does not exist

tightvnc
Launchpad, Ubuntu, Debian
hirsute Ignored
(end of life)
kinetic Ignored
(end of life, was needs-triage)
xenial Needs triage

bionic Needs triage

focal Needs triage

groovy Ignored
(end of life)
impish Ignored
(end of life)
jammy Needs triage

trusty Needs triage

upstream Needs triage

mantic Needs triage

lunar Ignored
(end of life, was needs-triage)
veyon
Launchpad, Ubuntu, Debian
hirsute Ignored
(end of life)
kinetic Ignored
(end of life, was needs-triage)
impish Ignored
(end of life)
bionic Does not exist

focal Needs triage

groovy Ignored
(end of life)
jammy Needs triage

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Needs triage

lunar Ignored
(end of life, was needs-triage)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H