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From: Marc Deslauriers <marc.deslauriers@canonical.com>
Reply-To: Ubuntu Security <security@ubuntu.com>
To: ubuntu-security-announce@lists.ubuntu.com
Message-ID: <8a2417f5-11c7-93f8-b256-d78a4ceb83f9@canonical.com>
Subject: [USN-3067-1] HarfBuzz vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-3067-1
August 24, 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

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

References:
  http://www.ubuntu.com/usn/usn-3067-1
  CVE-2015-8947, CVE-2016-2052

Package Information:
  https://launchpad.net/ubuntu/+source/harfbuzz/1.0.1-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/harfbuzz/0.9.27-1ubuntu1.1



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