USN-3067-1: HarfBuzz vulnerabilities

Ubuntu Security Notice USN-3067-1

24th 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 version:

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: http://ift.tt/17VXqjU.

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

References

CVE-2015-8947, CVE-2016-2052

from Ubuntu Security Notices http://ift.tt/2bi60CF