1. Ubuntu Security Notices
  2. USN-4636-1

USN-4636-1: LibVNCServer, Vino vulnerability

Publication date

17 November 2020

Overview

LibVNCServer and Vino could be made to crash.

Releases

Packages

Details

It was discovered that LibVNCServer incorrectly handled certain internals.
An attacker could possibly use this issue to cause a denial of service.
This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.

Vino package ships with a LibVNCServer source and all listed releases were
affected for this package.

It was discovered that LibVNCServer incorrectly handled certain internals.
An attacker could possibly use this issue to cause a denial of service.
This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.

Vino package ships with a LibVNCServer source and all listed releases were
affected for this package.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
20.10 groovy vino –  3.22.0-6ubuntu2.1
20.04 focal libvncclient1 –  0.9.12+dfsg-9ubuntu0.3
libvncserver1 –  0.9.12+dfsg-9ubuntu0.3
vino –  3.22.0-5ubuntu2.2
18.04 bionic libvncclient1 –  0.9.11+dfsg-1ubuntu1.4
libvncserver1 –  0.9.11+dfsg-1ubuntu1.4
vino –  3.22.0-3ubuntu1.2
16.04 xenial libvncclient1 –  0.9.10+dfsg-3ubuntu0.16.04.6
libvncserver1 –  0.9.10+dfsg-3ubuntu0.16.04.6
vino –  3.8.1-0ubuntu9.4

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References

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