CVE-2020-14403

Publication date 17 June 2020

Last updated 11 July 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.4 · Medium

Score breakdown

Description

An issue was discovered in LibVNCServer before 0.9.13. libvncserver/hextile.c allows out-of-bounds access via encodings.

Read the notes from the security team

Status

Package Ubuntu Release Status
x11vnc 25.10 questing
Not affected
25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic Ignored end of life, was needs-triage
23.04 lunar Ignored end of life, was needs-triage
22.10 kinetic Ignored end of life, was needs-triage
22.04 LTS jammy
Not affected
21.10 impish Ignored end of life
21.04 hirsute Ignored end of life
20.10 groovy Ignored end of life
20.04 LTS focal
Not affected
19.10 eoan Ignored end of life
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Needs evaluation
libvncserver 25.10 questing
Not affected
25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Not affected
20.10 groovy
Not affected
20.04 LTS focal
Fixed 0.9.12+dfsg-9ubuntu0.2
19.10 eoan Ignored end of life
18.04 LTS bionic
Fixed 0.9.11+dfsg-1ubuntu1.3
16.04 LTS xenial
Fixed 0.9.10+dfsg-3ubuntu0.16.04.5
14.04 LTS trusty Not in release
veyon 25.10 questing
Needs evaluation
25.04 plucky
Needs evaluation
24.10 oracular Ignored end of life, was needs-triage
24.04 LTS noble
Needs evaluation
23.10 mantic Ignored end of life, was needs-triage
23.04 lunar Ignored end of life, was needs-triage
22.10 kinetic Ignored end of life, was needs-triage
22.04 LTS jammy
Needs evaluation
21.10 impish Ignored end of life
21.04 hirsute Ignored end of life
20.10 groovy Ignored end of life
20.04 LTS focal
Needs evaluation
19.10 eoan Ignored end of life
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
vino 25.10 questing
Fixed 3.22.0-6ubuntu2
25.04 plucky
Fixed 3.22.0-6ubuntu2
24.10 oracular
Fixed 3.22.0-6ubuntu2
24.04 LTS noble
Fixed 3.22.0-6ubuntu2
23.10 mantic
Fixed 3.22.0-6ubuntu2
23.04 lunar
Fixed 3.22.0-6ubuntu2
22.10 kinetic
Fixed 3.22.0-6ubuntu2
22.04 LTS jammy
Fixed 3.22.0-6ubuntu2
21.10 impish
Fixed 3.22.0-6ubuntu2
21.04 hirsute
Fixed 3.22.0-6ubuntu2
20.10 groovy
Fixed 3.22.0-6ubuntu2
20.04 LTS focal
Fixed 3.22.0-5ubuntu2.1
18.04 LTS bionic
Fixed 3.22.0-3ubuntu1.1
16.04 LTS xenial
Fixed 3.8.1-0ubuntu9.3
14.04 LTS trusty Not in release

Notes

mdeslaur

same commit as CVE-2020-14402

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libvncserver

Severity score breakdown

Parameter Value
Base score 5.4 · Medium
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact Low
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

References

Related Ubuntu Security Notices (USN)

    • USN-4434-1
    • LibVNCServer vulnerabilities
    • 23 July 2020

Other references