CVE-2019-20840

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
mitreCNA
---
---
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 80%
VendorProductVersion
libvnc_projectlibvncserver
𝑥
≤ 0.9.12
canonicalubuntu_linux
14.04
canonicalubuntu_linux
16.04
canonicalubuntu_linux
16.04
canonicalubuntu_linux
18.04
canonicalubuntu_linux
18.10
canonicalubuntu_linux
20.04
debiandebian_linux
8.0
debiandebian_linux
9.0
siemenssimatic_itc1500_firmware
3.0.0.0 ≤
𝑥
< 3.2.1.0
siemenssimatic_itc1500_pro_firmware
3.0.0.0 ≤
𝑥
< 3.2.1.0
siemenssimatic_itc1900_firmware
3.0.0.0 ≤
𝑥
< 3.2.1.0
siemenssimatic_itc1900_pro_firmware
3.0.0.0 ≤
𝑥
< 3.2.1.0
siemenssimatic_itc2200_firmware
3.0.0.0 ≤
𝑥
< 3.2.1.0
siemenssimatic_itc2200_pro_firmware
3.0.0.0 ≤
𝑥
< 3.2.1.0
opensuseleap
15.2
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
libvncserver
bullseye
0.9.13+dfsg-2+deb11u1
fixed
buster
not-affected
stretch
not-affected
jessie
not-affected
sid
0.9.14+dfsg-1
fixed
trixie
0.9.14+dfsg-1
fixed
bookworm
0.9.14+dfsg-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libvncserver
noble
not-affected
mantic
not-affected
lunar
not-affected
kinetic
not-affected
jammy
not-affected
impish
not-affected
hirsute
not-affected
groovy
not-affected
focal
not-affected
eoan
ignored
bionic
Fixed 0.9.11+dfsg-1ubuntu1.3
released
xenial
Fixed 0.9.10+dfsg-3ubuntu0.16.04.5
released
trusty
dne
veyon
noble
needs-triage
mantic
ignored
lunar
ignored
kinetic
ignored
jammy
needs-triage
impish
ignored
hirsute
ignored
groovy
ignored
focal
needs-triage
eoan
ignored
bionic
dne
xenial
dne
trusty
dne
x11vnc
noble
needs-triage
mantic
ignored
lunar
ignored
kinetic
ignored
jammy
needs-triage
impish
ignored
hirsute
ignored
groovy
ignored
focal
needs-triage
eoan
ignored
bionic
needs-triage
xenial
needs-triage
trusty
needs-triage