CVE-2018-20020

LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains heap out-of-bound write vulnerability inside structure in VNC client code that can result remote code execution
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 94.71%
Affected Products (NVD)
VendorProductVersion
libvnc_projectlibvncserver
𝑥
< 0.9.12
canonicalubuntu_linux
14.04
canonicalubuntu_linux
16.04
canonicalubuntu_linux
18.04
canonicalubuntu_linux
18.10
debiandebian_linux
8.0
debiandebian_linux
9.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
libvncserver
bookworm
0.9.14+dfsg-1
fixed
bullseye
0.9.13+dfsg-2+deb11u1
fixed
sid
0.9.14+dfsg-1
fixed
stretch
not-affected
trixie
0.9.14+dfsg-1
fixed
ssvnc
bookworm
1.0.29-6
fixed
bullseye
1.0.29-5
fixed
sid
1.0.29-6.1
fixed
stretch
not-affected
trixie
1.0.29-6.1
fixed
veyon
bookworm
4.7.5+repack1-1
fixed
bullseye
4.5.3+repack1-1
fixed
sid
4.7.5+repack1-1.1
fixed
stretch
not-affected
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
tightvnc
bionic
needs-triage
focal
needs-triage
groovy
ignored
hirsute
ignored
impish
ignored
jammy
needs-triage
kinetic
ignored
lunar
ignored
mantic
ignored
noble
needs-triage
oracular
ignored
plucky
ignored
questing
ignored
resolute
needs-triage
trusty
Fixed 1.3.9-6.5+deb8u1build0.14.04.1~esm1
released
xenial
needs-triage
italc
bionic
Fixed 1:3.0.3+dfsg1-3ubuntu0.1
released
focal
dne
groovy
dne
hirsute
dne
impish
dne
jammy
dne
kinetic
dne
lunar
dne
mantic
dne
noble
dne
oracular
dne
plucky
dne
questing
dne
resolute
dne
trusty
dne
xenial
Fixed 1:2.0.2+dfsg1-4ubuntu0.1
released
libvncserver
bionic
Fixed 0.9.11+dfsg-1ubuntu1.1
released
cosmic
Fixed 0.9.11+dfsg-1.1ubuntu0.1
released
disco
not-affected
focal
not-affected
groovy
not-affected
hirsute
not-affected
impish
not-affected
jammy
not-affected
kinetic
not-affected
lunar
not-affected
mantic
not-affected
noble
not-affected
oracular
not-affected
plucky
not-affected
questing
not-affected
resolute
not-affected
trusty
Fixed 0.9.9+dfsg-1ubuntu1.4
released
xenial
Fixed 0.9.10+dfsg-3ubuntu0.16.04.3
released
ssvnc
bionic
needed
focal
not-affected
groovy
not-affected
hirsute
not-affected
impish
not-affected
jammy
not-affected
kinetic
not-affected
lunar
not-affected
mantic
not-affected
noble
not-affected
oracular
not-affected
plucky
not-affected
questing
not-affected
resolute
not-affected
trusty
dne
xenial
Fixed 1.0.29-2+deb8u1build0.16.04.1
released
x11vnc
bionic
not-affected
cosmic
ignored
disco
not-affected
focal
not-affected
groovy
not-affected
hirsute
not-affected
impish
not-affected
jammy
not-affected
kinetic
not-affected
lunar
not-affected
mantic
not-affected
noble
not-affected
oracular
not-affected
plucky
not-affected
questing
not-affected
resolute
not-affected
trusty
not-affected
xenial
not-affected
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
libvncclient0
suse enterprise desktop 15 SP2
0.9.10-4.3.1
fixed
suse enterprise desktop 15 SP3
0.9.10-4.3.1
fixed
suse enterprise sap 12
0.9.9-17.8.1
fixed
suse enterprise sap 12 SP1
0.9.9-17.8.1
fixed
suse enterprise sap 12 SP2
0.9.9-17.8.1
fixed
suse enterprise sap 12 SP3
0.9.9-17.8.1
fixed
suse enterprise sap 12 SP4
0.9.9-17.8.1
fixed
suse enterprise sap 12 SP5
0.9.9-17.14.1
fixed
suse enterprise sap 15 SP2
0.9.10-4.3.1
fixed
suse enterprise sap 15 SP3
0.9.10-4.3.1
fixed
suse enterprise server 12
0.9.9-17.8.1
fixed
suse enterprise server 12 SP1
0.9.9-17.8.1
fixed
suse enterprise server 12 SP2
0.9.9-17.8.1
fixed
suse enterprise server 12 SP3
0.9.9-17.8.1
fixed
suse enterprise server 12 SP4
0.9.9-17.8.1
fixed
suse enterprise server 12 SP5
0.9.9-17.14.1
fixed
suse enterprise server 15 SP2
0.9.10-4.3.1
fixed
suse enterprise server 15 SP3
0.9.10-4.3.1
fixed
suse enterprise workstation 15 SP2
0.9.10-4.3.1
fixed
suse enterprise workstation 15 SP3
0.9.10-4.3.1
fixed
libvncclient1
suse enterprise desktop 15 SP4
0.9.13-150400.1.9
fixed
suse enterprise sap 15 SP4
0.9.13-150400.1.9
fixed
suse enterprise server 15 SP4
0.9.13-150400.1.9
fixed
suse enterprise workstation 15 SP4
0.9.13-150400.1.9
fixed
libvncserver0
suse enterprise desktop 15 SP2
0.9.10-4.3.1
fixed
suse enterprise desktop 15 SP3
0.9.10-4.3.1
fixed
suse enterprise sap 12
0.9.9-17.8.1
fixed
suse enterprise sap 12 SP1
0.9.9-17.8.1
fixed
suse enterprise sap 12 SP2
0.9.9-17.8.1
fixed
suse enterprise sap 12 SP3
0.9.9-17.8.1
fixed
suse enterprise sap 12 SP4
0.9.9-17.8.1
fixed
suse enterprise sap 12 SP5
0.9.9-17.14.1
fixed
suse enterprise sap 15 SP2
0.9.10-4.3.1
fixed
suse enterprise sap 15 SP3
0.9.10-4.3.1
fixed
suse enterprise server 12
0.9.9-17.8.1
fixed
suse enterprise server 12 SP1
0.9.9-17.8.1
fixed
suse enterprise server 12 SP2
0.9.9-17.8.1
fixed
suse enterprise server 12 SP3
0.9.9-17.8.1
fixed
suse enterprise server 12 SP4
0.9.9-17.8.1
fixed
suse enterprise server 12 SP5
0.9.9-17.14.1
fixed
suse enterprise server 15 SP2
0.9.10-4.3.1
fixed
suse enterprise server 15 SP3
0.9.10-4.3.1
fixed
suse enterprise workstation 15 SP2
0.9.10-4.3.1
fixed
suse enterprise workstation 15 SP3
0.9.10-4.3.1
fixed
libvncserver1
suse enterprise desktop 15 SP4
0.9.13-150400.1.9
fixed
suse enterprise sap 15 SP4
0.9.13-150400.1.9
fixed
suse enterprise server 15 SP4
0.9.13-150400.1.9
fixed
suse enterprise workstation 15 SP4
0.9.13-150400.1.9
fixed
Common Weakness Enumeration
References
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-030-libvnc-heap-out-of-bound-write/
https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
https://lists.debian.org/debian-lts-announce/2019/11/msg00033.html
https://security.gentoo.org/glsa/201908-05
https://security.gentoo.org/glsa/202006-06
https://usn.ubuntu.com/3877-1/
https://usn.ubuntu.com/4547-1/
https://usn.ubuntu.com/4547-2/
https://usn.ubuntu.com/4587-1/
https://www.debian.org/security/2019/dsa-4383
https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-030-libvnc-heap-out-of-bound-write/
https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html
https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
https://lists.debian.org/debian-lts-announce/2019/11/msg00033.html
https://security.gentoo.org/glsa/201908-05
https://security.gentoo.org/glsa/202006-06
https://usn.ubuntu.com/3877-1/
https://usn.ubuntu.com/4547-1/
https://usn.ubuntu.com/4547-2/
https://usn.ubuntu.com/4587-1/
https://www.debian.org/security/2019/dsa-4383