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==========================================================================
Ubuntu Security Notice USN-3755-1
August 27, 2018

libgd2 vulnerabilities
==========================================================================

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in GD.

Software Description:
- libgd2: GD Graphics Library

Details:

It was discovered that GD incorrectly handled certain images.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2018-1000222)

It was discovered that GD incorrectly handled certain GIF files.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2018-5711)

Update instructions:

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

Ubuntu 18.04 LTS:
  libgd-tools                     2.2.5-4ubuntu0.2
  libgd3                          2.2.5-4ubuntu0.2

Ubuntu 16.04 LTS:
  libgd-tools                     2.1.1-4ubuntu0.16.04.10
  libgd3                          2.1.1-4ubuntu0.16.04.10

Ubuntu 14.04 LTS:
  libgd-tools                     2.1.0-3ubuntu0.10
  libgd3                          2.1.0-3ubuntu0.10

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

References:
  https://usn.ubuntu.com/usn/usn-3755-1
  CVE-2018-1000222, CVE-2018-5711

Package Information:
  https://launchpad.net/ubuntu/+source/libgd2/2.2.5-4ubuntu0.2
  https://launchpad.net/ubuntu/+source/libgd2/2.1.1-4ubuntu0.16.04.10
  https://launchpad.net/ubuntu/+source/libgd2/2.1.0-3ubuntu0.10
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