CVE-2020-25708
Published: 13 November 2020
A divide by zero issue was found to occur in libvncserver-0.9.12. A malicious client could use this flaw to send a specially crafted message that, when processed by the VNC server, would lead to a floating point exception, resulting in a denial of service.
Notes
| Author | Note |
|---|---|
| leosilva | vino ships libvncserver source in server/libvncserver |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
italc Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| impish |
Does not exist
|
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| mantic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was needs-triage)
|
|
| upstream |
Needs triage
|
|
| xenial |
Needs triage
|
|
|
libvncserver Launchpad, Ubuntu, Debian |
bionic |
Released
(0.9.11+dfsg-1ubuntu1.4)
|
| focal |
Released
(0.9.12+dfsg-9ubuntu0.3)
|
|
| groovy |
Not vulnerable
|
|
| hirsute |
Not vulnerable
|
|
| impish |
Not vulnerable
|
|
| jammy |
Not vulnerable
|
|
| kinetic |
Not vulnerable
|
|
| lunar |
Not vulnerable
|
|
| mantic |
Not vulnerable
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Released
(0.9.10+dfsg-3ubuntu0.16.04.6)
|
|
|
Patches: upstream: https://github.com/LibVNC/libvncserver/commit/673c07a75ed844d74676f3ccdcfdc706a7052dba |
||
|
tightvnc Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
| focal |
Needs triage
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Needs triage
|
|
| kinetic |
Ignored
(end of life, was needs-triage)
|
|
| lunar |
Ignored
(end of life, was needs-triage)
|
|
| mantic |
Needs triage
|
|
| trusty |
Needs triage
|
|
| upstream |
Needs triage
|
|
| xenial |
Needs triage
|
|
|
veyon Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Needs triage
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Needs triage
|
|
| kinetic |
Ignored
(end of life, was needs-triage)
|
|
| lunar |
Ignored
(end of life, was needs-triage)
|
|
| mantic |
Needs triage
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
|
vino Launchpad, Ubuntu, Debian |
bionic |
Released
(3.22.0-3ubuntu1.2)
|
| focal |
Released
(3.22.0-5ubuntu2.2)
|
|
| groovy |
Released
(3.22.0-6ubuntu2.1)
|
|
| hirsute |
Released
(3.22.0-6ubuntu3)
|
|
| impish |
Released
(3.22.0-6ubuntu3)
|
|
| jammy |
Released
(3.22.0-6ubuntu3)
|
|
| kinetic |
Released
(3.22.0-6ubuntu3)
|
|
| lunar |
Released
(3.22.0-6ubuntu3)
|
|
| mantic |
Released
(3.22.0-6ubuntu3)
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Released
(3.8.1-0ubuntu9.4)
|
|
|
x11vnc Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
| focal |
Needs triage
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Needs triage
|
|
| kinetic |
Ignored
(end of life, was needs-triage)
|
|
| lunar |
Ignored
(end of life, was needs-triage)
|
|
| mantic |
Needs triage
|
|
| trusty |
Needs triage
|
|
| upstream |
Needs triage
|
|
| xenial |
Needs triage
|
|
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |