CVE-2018-20023
Published: 19 December 2018
LibVNC before 8b06f835e259652b0ff026898014fc7297ade858 contains CWE-665: Improper Initialization vulnerability in VNC Repeater 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 |
|---|---|---|
|
italc Launchpad, Ubuntu, Debian |
bionic |
Released
(1:3.0.3+dfsg1-3ubuntu0.1)
|
| focal |
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)
|
|
|
libvncserver Launchpad, Ubuntu, Debian |
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)
|
|
| 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)
|
|
|
Patches: upstream: https://github.com/LibVNC/libvncserver/commit/8b06f835e259652b0ff026898014fc7297ade858 |
||
|
x11vnc Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(uses shared libvnc)
|
| cosmic |
Ignored
(end of life)
|
|
| disco |
Not vulnerable
(uses shared libvnc)
|
|
| focal |
Not vulnerable
(uses shared libvnc)
|
|
| trusty |
Not vulnerable
(uses shared libvnc)
|
|
| upstream |
Needs triage
|
|
| xenial |
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 |