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
Status
Package | Release | Status |
---|---|---|
tightvnc Launchpad, Ubuntu, Debian |
groovy |
Ignored
(end of life)
|
hirsute |
Ignored
(end of life)
|
|
kinetic |
Ignored
(end of life, was needs-triage)
|
|
jammy |
Needs triage
|
|
bionic |
Needs triage
|
|
focal |
Needs triage
|
|
impish |
Ignored
(end of life)
|
|
lunar |
Needs triage
|
|
trusty |
Released
(1.3.9-6.5+deb8u1build0.14.04.1~esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
upstream |
Released
(1:1.3.9-6.5+deb8u1)
|
|
xenial |
Needs triage
|
|
mantic |
Needs triage
|
|
italc Launchpad, Ubuntu, Debian |
jammy |
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
|
|
kinetic |
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
|
|
libvncserver Launchpad, Ubuntu, Debian |
jammy |
Not vulnerable
(0.9.11+dfsg-1.2)
|
lunar |
Not vulnerable
(0.9.11+dfsg-1.2)
|
|
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)
|
|
kinetic |
Not vulnerable
(0.9.11+dfsg-1.2)
|
|
trusty |
Released
(0.9.9+dfsg-1ubuntu1.4)
|
|
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/2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 |
||
ssvnc Launchpad, Ubuntu, Debian |
jammy |
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)
|
|
kinetic |
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)
|
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)
|
|
kinetic |
Not vulnerable
(uses shared libvnc)
|
|
lunar |
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 | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20022
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-032-libvnc-multiple-memory-leaks/
- 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