CVE-2018-20021
Published: 19 December 2018
LibVNC before commit c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c contains a CWE-835: Infinite loop vulnerability in VNC client code. Vulnerability allows attacker to consume excessive amount of resources like CPU and RAM
Priority
Status
Package | Release | Status |
---|---|---|
italc Launchpad, Ubuntu, Debian |
impish |
Does not exist
|
jammy |
Does not exist
|
|
focal |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
bionic |
Released
(1:3.0.3+dfsg1-3ubuntu0.1)
|
|
groovy |
Does not exist
|
|
hirsute |
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)
|
|
mantic |
Does not exist
|
|
tightvnc Launchpad, Ubuntu, Debian |
impish |
Ignored
(end of life)
|
hirsute |
Ignored
(end of life)
|
|
jammy |
Needs triage
|
|
xenial |
Needs triage
|
|
kinetic |
Ignored
(end of life, was 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
|
|
bionic |
Needs triage
|
|
focal |
Needs triage
|
|
groovy |
Ignored
(end of life)
|
|
upstream |
Released
(1:1.3.9-6.5+deb8u1)
|
|
mantic |
Needs triage
|
|
libvncserver Launchpad, Ubuntu, Debian |
jammy |
Not vulnerable
(0.9.11+dfsg-1.2)
|
kinetic |
Not vulnerable
(0.9.11+dfsg-1.2)
|
|
lunar |
Not vulnerable
(0.9.11+dfsg-1.2)
|
|
trusty |
Released
(0.9.9+dfsg-1ubuntu1.4)
|
|
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)
|
|
focal |
Not vulnerable
(0.9.11+dfsg-1.2)
|
|
groovy |
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)
|
|
upstream |
Released
(0.9.11+dfsg-1.2)
|
|
xenial |
Released
(0.9.10+dfsg-3ubuntu0.16.04.3)
|
|
mantic |
Not vulnerable
(0.9.11+dfsg-1.2)
|
|
Patches: upstream: https://github.com/LibVNC/libvncserver/commit/c3115350eb8bb635d0fdb4dbbb0d0541f38ed19c |
||
ssvnc Launchpad, Ubuntu, Debian |
jammy |
Not vulnerable
(1.0.29-5)
|
kinetic |
Not vulnerable
(1.0.29-5)
|
|
lunar |
Not vulnerable
(1.0.29-5)
|
|
bionic |
Needed
|
|
focal |
Not vulnerable
(1.0.29-5)
|
|
groovy |
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)
|
|
xenial |
Released
(1.9.29-2+deb8u1build0.16.04.1)
|
|
mantic |
Not vulnerable
(1.0.29-5)
|
|
x11vnc Launchpad, Ubuntu, Debian |
jammy |
Not vulnerable
(uses shared libvnc)
|
kinetic |
Not vulnerable
(uses shared libvnc)
|
|
lunar |
Not vulnerable
(uses shared libvnc)
|
|
bionic |
Not vulnerable
(uses shared libvnc)
|
|
cosmic |
Ignored
(end of life)
|
|
disco |
Not vulnerable
(uses shared libvnc)
|
|
focal |
Not vulnerable
(uses shared libvnc)
|
|
groovy |
Not vulnerable
(uses shared libvnc)
|
|
hirsute |
Not vulnerable
(uses shared libvnc)
|
|
impish |
Not vulnerable
(uses shared libvnc)
|
|
trusty |
Not vulnerable
(uses shared libvnc)
|
|
upstream |
Needs triage
|
|
xenial |
Not vulnerable
(uses shared libvnc)
|
|
mantic |
Not vulnerable
(uses shared libvnc)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20021
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-031-libvnc-infinite-loop/
- https://ubuntu.com/security/notices/USN-3877-1
- https://ubuntu.com/security/notices/USN-4547-1
- https://ubuntu.com/security/notices/USN-4547-2
- https://ubuntu.com/security/notices/USN-4587-1
- NVD
- Launchpad
- Debian