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CVE-2019-20788

Published: 23 April 2020

libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap-based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.

Priority

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
libvncserver
Launchpad, Ubuntu, Debian
upstream Needs triage

trusty Does not exist

xenial
Released (0.9.10+dfsg-3ubuntu0.16.04.4)
bionic
Released (0.9.11+dfsg-1ubuntu1.2)
eoan
Released (0.9.11+dfsg-1.3ubuntu0.1)
focal Not vulnerable

hirsute Not vulnerable

jammy Not vulnerable

lunar Not vulnerable

groovy Not vulnerable

impish Not vulnerable

kinetic Not vulnerable

Patches:
upstream: https://github.com/LibVNC/libvncserver/commit/54220248886b5001fbbb9fa73c4e1a2cb9413fed
x11vnc
Launchpad, Ubuntu, Debian
upstream Needs triage

trusty Needs triage

bionic Needs triage

eoan Ignored
(end of life)
focal Needs triage

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

jammy Needs triage

impish Ignored
(end of life)
lunar Needs triage

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