CVE-2018-20020

Published: 19 December 2018

LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client code that can result remote code execution

Priority

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package	Release	Status
tightvnc Launchpad, Ubuntu, Debian	hirsute	Ignored (end of life)
	kinetic	Ignored (end of life, was needs-triage)
	jammy	Needs triage
	upstream	Released (1:1.3.9-6.5+deb8u1)
	bionic	Needs triage
	focal	Needs triage
	groovy	Ignored (end of life)
	xenial	Needs triage
	trusty	Released (1.3.9-6.5+deb8u1build0.14.04.1~esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	lunar	Needs triage
	impish	Ignored (end of life)
libvncserver Launchpad, Ubuntu, Debian	upstream	Released (0.9.11+dfsg-1.2)
	xenial	Released (0.9.10+dfsg-3ubuntu0.16.04.3)
	bionic	Released (0.9.11+dfsg-1ubuntu1.1)
	cosmic	Released (0.9.11+dfsg-1.1ubuntu0.1)
	disco	Not vulnerable (0.9.11+dfsg-1.2)
	groovy	Not vulnerable (0.9.11+dfsg-1.2)
	jammy	Not vulnerable (0.9.11+dfsg-1.2)
	kinetic	Not vulnerable (0.9.11+dfsg-1.2)
	trusty	Released (0.9.9+dfsg-1ubuntu1.4)
	lunar	Not vulnerable (0.9.11+dfsg-1.2)
	focal	Not vulnerable (0.9.11+dfsg-1.2)
	hirsute	Not vulnerable (0.9.11+dfsg-1.2)
	impish	Not vulnerable (0.9.11+dfsg-1.2)
	Patches: upstream: https://github.com/LibVNC/libvncserver/commit/09f2f3fb6a5a163e453e5c2979054670c39694bc upstream: https://github.com/LibVNC/libvncserver/commit/7b1ef0ffc4815cab9a96c7278394152bdc89dc4d
x11vnc Launchpad, Ubuntu, Debian	trusty	Not vulnerable (uses shared libvnc)
	bionic	Not vulnerable (uses shared libvnc)
	cosmic	Ignored (end of life)
	disco	Not vulnerable (uses shared libvnc)
	groovy	Not vulnerable (uses shared libvnc)
	jammy	Not vulnerable (uses shared libvnc)
	kinetic	Not vulnerable (uses shared libvnc)
	lunar	Not vulnerable (uses shared libvnc)
	focal	Not vulnerable (uses shared libvnc)
	hirsute	Not vulnerable (uses shared libvnc)
	impish	Not vulnerable (uses shared libvnc)
	upstream	Needs triage
	xenial	Not vulnerable (uses shared libvnc)
italc Launchpad, Ubuntu, Debian	jammy	Does not exist
	kinetic	Does not exist
	lunar	Does not exist
	bionic	Released (1:3.0.3+dfsg1-3ubuntu0.1)
	focal	Does not exist
	groovy	Does not exist
	hirsute	Does not exist
	impish	Does not exist
	trusty	Does not exist (trusty was needed)
	upstream	Released (1:3.0.3+dfsg1-1+deb9u1, 1:2.0.2+dfsg1-2+deb8u1)
	xenial	Released (1:2.0.2+dfsg1-4ubuntu0.1)
ssvnc Launchpad, Ubuntu, Debian	jammy	Not vulnerable (1.0.29-5)
	xenial	Released (1.9.29-2+deb8u1build0.16.04.1)
	bionic	Needed
	focal	Not vulnerable (1.0.29-5)
	groovy	Not vulnerable (1.0.29-5)
	kinetic	Not vulnerable (1.0.29-5)
	lunar	Not vulnerable (1.0.29-5)
	hirsute	Not vulnerable (1.0.29-5)
	impish	Not vulnerable (1.0.29-5)
	trusty	Does not exist (trusty was needed)
	upstream	Released (1.0.29-2+deb8u1, 1.0.29-3+deb9u1, 1.0.29-4+deb10u1, 1.0.29-5)

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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Bugs

Join the discussion

Canonical is offering Expanded Security Maintenance

Canonical is offering Ubuntu Expanded Security Maintenance (ESM) for security fixes and essential packages.

Find out more about ESM ›