A FreeType security update has been released for Ubuntu Linux 16.04 LTS, 18.04 LTS, and 20.04 LTS.

USN-4593-1: FreeType vulnerability

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Ubuntu Security Notice USN-4593-1
October 20, 2020

freetype vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

FreeType could be made to crash or run programs as your login if it
opened a specially crafted file.

Software Description:
- freetype: FreeType 2 is a font engine library

Details:

Sergei Glazunov discovered that FreeType did not correctly handle certain
malformed font files. If a user were tricked into using a specially crafted
font file, a remote attacker could cause FreeType to crash or possibly
execute arbitrary code with user privileges.

Update instructions:

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

Ubuntu 20.04 LTS:
libfreetype6 2.10.1-2ubuntu0.1

Ubuntu 18.04 LTS:
libfreetype6 2.8.1-2ubuntu2.1

Ubuntu 16.04 LTS:
libfreetype6 2.6.1-0.1ubuntu2.5

After a standard system update you need to restart your session to make
all the necessary changes.

References:
  https://usn.ubuntu.com/4593-1
CVE-2020-15999

Package Information:
  https://launchpad.net/ubuntu/+source/freetype/2.10.1-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/freetype/2.8.1-2ubuntu2.1
  https://launchpad.net/ubuntu/+source/freetype/2.6.1-0.1ubuntu2.5