USN-3067-1: HarfBuzz vulnerabilities

24 August 2016

harfbuzz vulnerabilities

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

  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

HarfBuzz could be made to crash or run programs as your login if it processed specially crafted data.

Software Description

  • harfbuzz - OpenType text shaping engine

Details

Kostya Serebryany discovered that HarfBuzz incorrectly handled memory. A remote attacker could use this issue to cause HarfBuzz to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2015-8947)

It was discovered that HarfBuzz incorrectly handled certain length checks. A remote attacker could use this issue to cause HarfBuzz to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only applied to Ubuntu 16.04 LTS. (CVE-2016-2052)

Update instructions

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

Ubuntu 16.04 LTS
libharfbuzz0b - 1.0.1-1ubuntu0.1
Ubuntu 14.04 LTS
libharfbuzz0b - 0.9.27-1ubuntu1.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References