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CVE-2019-20840

Published: 17 June 2020

An issue was discovered in LibVNCServer before 0.9.13. libvncserver/ws_decode.c can lead to a crash because of unaligned accesses in hybiReadAndDecode.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
libvncserver
Launchpad, Ubuntu, Debian
bionic
Released (0.9.11+dfsg-1ubuntu1.3)
eoan Ignored
(reached end-of-life)
focal Not vulnerable

groovy Not vulnerable
(0.9.13+dfsg-1)
hirsute Not vulnerable
(0.9.13+dfsg-1)
impish Not vulnerable
(0.9.13+dfsg-1)
jammy Not vulnerable
(0.9.13+dfsg-1)
kinetic Not vulnerable
(0.9.13+dfsg-1)
precise Does not exist

trusty Does not exist

upstream Needs triage

xenial
Released (0.9.10+dfsg-3ubuntu0.16.04.5)
Patches:
upstream: https://github.com/LibVNC/libvncserver/commit/0cf1400c61850065de590d403f6d49e32882fd76
veyon
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Ignored
(reached end-of-life)
focal Needs triage

groovy Ignored
(reached end-of-life)
hirsute Ignored
(reached end-of-life)
impish Ignored
(reached end-of-life)
jammy Needs triage

kinetic Needs triage

precise Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

x11vnc
Launchpad, Ubuntu, Debian
bionic Needs triage

eoan Ignored
(reached end-of-life)
focal Needs triage

groovy Ignored
(reached end-of-life)
hirsute Ignored
(reached end-of-life)
impish Ignored
(reached end-of-life)
jammy Needs triage

kinetic Needs triage

precise Does not exist

trusty Needs triage

upstream Needs triage

xenial 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