CVE-2018-20022

Published: 19 December 2018

LibVNC before 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 contains multiple weaknesses CWE-665: Improper Initialization vulnerability in VNC client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memory layout and in bypassing ASLR

Priority

Medium

CVSS 3 base score: 7.5

Status

Package Release Status
italc
Launchpad, Ubuntu, Debian
Upstream
Released (1:3.0.3+dfsg1-1+deb9u1, 1:2.0.2+dfsg1-2+deb8u1)
Ubuntu 20.10 (Groovy Gorilla) Does not exist

Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver)
Released (1:3.0.3+dfsg1-3ubuntu0.1)
Ubuntu 16.04 LTS (Xenial Xerus)
Released (1:2.0.2+dfsg1-4ubuntu0.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was needed)
Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

libvncserver
Launchpad, Ubuntu, Debian
Upstream
Released (0.9.11+dfsg-1.2)
Ubuntu 20.10 (Groovy Gorilla) Not vulnerable
(0.9.11+dfsg-1.2)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(0.9.11+dfsg-1.2)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (0.9.11+dfsg-1ubuntu1.1)
Ubuntu 16.04 LTS (Xenial Xerus)
Released (0.9.10+dfsg-3ubuntu0.16.04.3)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was released [0.9.9+dfsg-1ubuntu1.4])
Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

Patches:
Upstream: https://github.com/LibVNC/libvncserver/commit/2f5b2ad1c6c99b1ac6482c95844a84d66bb52838
ssvnc
Launchpad, Ubuntu, Debian
Upstream
Released (1.0.29-2+deb8u1, 1.0.29-3+deb9u1, 1.0.29-4+deb10u1, 1.0.29-5)
Ubuntu 20.10 (Groovy Gorilla) Not vulnerable
(1.0.29-5)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(1.0.29-5)
Ubuntu 18.04 LTS (Bionic Beaver) Needed

Ubuntu 16.04 LTS (Xenial Xerus)
Released (1.9.29-2+deb8u1build0.16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was needed)
Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

tightvnc
Launchpad, Ubuntu, Debian
Upstream
Released (1:1.3.9-6.5+deb8u1)
Ubuntu 20.10 (Groovy Gorilla) Needs triage

Ubuntu 20.04 LTS (Focal Fossa) Needs triage

Ubuntu 18.04 LTS (Bionic Beaver) Needs triage

Ubuntu 16.04 LTS (Xenial Xerus) Needs triage

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was needed)
Ubuntu 12.04 ESM (Precise Pangolin) Does not exist

x11vnc
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 20.10 (Groovy Gorilla) Not vulnerable
(uses shared libvnc)
Ubuntu 20.04 LTS (Focal Fossa) Not vulnerable
(uses shared libvnc)
Ubuntu 18.04 LTS (Bionic Beaver) Not vulnerable
(uses shared libvnc)
Ubuntu 16.04 LTS (Xenial Xerus) Not vulnerable
(uses shared libvnc)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(uses shared libvnc)
Ubuntu 12.04 ESM (Precise Pangolin) Does not exist